diff --git a/data/gapminder07.csv b/data/gapminder07.csv
new file mode 100644
index 0000000..a72370c
--- /dev/null
+++ b/data/gapminder07.csv
@@ -0,0 +1,143 @@
+"country","year","pop","continent","lifeExp","gdpPercap","lifeExp_round","lifeExp_over70","lifeExp_highlow","lifeExp_high_low"
+"Afghanistan",2007,31889923,"Asia",43.828,974.5803384,44,"No",NA,"Low"
+"Albania",2007,3600523,"Europe",76.423,5937.029526,76,"Yes",NA,"High"
+"Algeria",2007,33333216,"Africa",72.301,6223.367465,72,"Yes",NA,"High"
+"Angola",2007,12420476,"Africa",42.731,4797.231267,43,"No",NA,"Low"
+"Argentina",2007,40301927,"Americas",75.32,12779.37964,75,"Yes",NA,"High"
+"Australia",2007,20434176,"Oceania",81.235,34435.36744,81,"Yes",NA,"High"
+"Austria",2007,8199783,"Europe",79.829,36126.4927,80,"Yes",NA,"High"
+"Bahrain",2007,708573,"Asia",75.635,29796.04834,76,"Yes",NA,"High"
+"Bangladesh",2007,150448339,"Asia",64.062,1391.253792,64,"No",NA,"Low"
+"Belgium",2007,10392226,"Europe",79.441,33692.60508,79,"Yes",NA,"High"
+"Benin",2007,8078314,"Africa",56.728,1441.284873,57,"No",NA,"Low"
+"Bolivia",2007,9119152,"Americas",65.554,3822.137084,66,"No",NA,"Low"
+"Bosnia and Herzegovina",2007,4552198,"Europe",74.852,7446.298803,75,"Yes",NA,"High"
+"Botswana",2007,1639131,"Africa",50.728,12569.85177,51,"No",NA,"Low"
+"Brazil",2007,190010647,"Americas",72.39,9065.800825,72,"Yes",NA,"High"
+"Bulgaria",2007,7322858,"Europe",73.005,10680.79282,73,"Yes",NA,"High"
+"Burkina Faso",2007,14326203,"Africa",52.295,1217.032994,52,"No",NA,"Low"
+"Burundi",2007,8390505,"Africa",49.58,430.0706916,50,"No",NA,"Low"
+"Cambodia",2007,14131858,"Asia",59.723,1713.778686,60,"No",NA,"Low"
+"Cameroon",2007,17696293,"Africa",50.43,2042.09524,50,"No",NA,"Low"
+"Canada",2007,33390141,"Americas",80.653,36319.23501,81,"Yes",NA,"High"
+"Central African Republic",2007,4369038,"Africa",44.741,706.016537,45,"No",NA,"Low"
+"Chad",2007,10238807,"Africa",50.651,1704.063724,51,"No",NA,"Low"
+"Chile",2007,16284741,"Americas",78.553,13171.63885,79,"Yes",NA,"High"
+"China",2007,1318683096,"Asia",72.961,4959.114854,73,"Yes",NA,"High"
+"Colombia",2007,44227550,"Americas",72.889,7006.580419,73,"Yes",NA,"High"
+"Comoros",2007,710960,"Africa",65.152,986.1478792,65,"No",NA,"Low"
+"Congo Dem. Rep.",2007,64606759,"Africa",46.462,277.5518587,46,"No",NA,"Low"
+"Congo Rep.",2007,3800610,"Africa",55.322,3632.557798,55,"No",NA,"Low"
+"Costa Rica",2007,4133884,"Americas",78.782,9645.06142,79,"Yes",NA,"High"
+"Cote d'Ivoire",2007,18013409,"Africa",48.328,1544.750112,48,"No",NA,"Low"
+"Croatia",2007,4493312,"Europe",75.748,14619.22272,76,"Yes",NA,"High"
+"Cuba",2007,11416987,"Americas",78.273,8948.102923,78,"Yes",NA,"High"
+"Czech Republic",2007,10228744,"Europe",76.486,22833.30851,76,"Yes",NA,"High"
+"Denmark",2007,5468120,"Europe",78.332,35278.41874,78,"Yes",NA,"High"
+"Djibouti",2007,496374,"Africa",54.791,2082.481567,55,"No",NA,"Low"
+"Dominican Republic",2007,9319622,"Americas",72.235,6025.374752,72,"Yes",NA,"High"
+"Ecuador",2007,13755680,"Americas",74.994,6873.262326,75,"Yes",NA,"High"
+"Egypt",2007,80264543,"Africa",71.338,5581.180998,71,"Yes",NA,"High"
+"El Salvador",2007,6939688,"Americas",71.878,5728.353514,72,"Yes",NA,"High"
+"Equatorial Guinea",2007,551201,"Africa",51.579,12154.08975,52,"No",NA,"Low"
+"Eritrea",2007,4906585,"Africa",58.04,641.3695236,58,"No",NA,"Low"
+"Ethiopia",2007,76511887,"Africa",52.947,690.8055759,53,"No",NA,"Low"
+"Finland",2007,5238460,"Europe",79.313,33207.0844,79,"Yes",NA,"High"
+"France",2007,61083916,"Europe",80.657,30470.0167,81,"Yes",NA,"High"
+"Gabon",2007,1454867,"Africa",56.735,13206.48452,57,"No",NA,"Low"
+"Gambia",2007,1688359,"Africa",59.448,752.7497265,59,"No",NA,"Low"
+"Germany",2007,82400996,"Europe",79.406,32170.37442,79,"Yes",NA,"High"
+"Ghana",2007,22873338,"Africa",60.022,1327.60891,60,"No",NA,"Low"
+"Greece",2007,10706290,"Europe",79.483,27538.41188,79,"Yes",NA,"High"
+"Guatemala",2007,12572928,"Americas",70.259,5186.050003,70,"Yes",NA,"High"
+"Guinea",2007,9947814,"Africa",56.007,942.6542111,56,"No",NA,"Low"
+"Guinea-Bissau",2007,1472041,"Africa",46.388,579.231743,46,"No",NA,"Low"
+"Haiti",2007,8502814,"Americas",60.916,1201.637154,61,"No",NA,"Low"
+"Honduras",2007,7483763,"Americas",70.198,3548.330846,70,"Yes",NA,"High"
+"Hong Kong China",2007,6980412,"Asia",82.208,39724.97867,82,"Yes",NA,"High"
+"Hungary",2007,9956108,"Europe",73.338,18008.94444,73,"Yes",NA,"High"
+"Iceland",2007,301931,"Europe",81.757,36180.78919,82,"Yes",NA,"High"
+"India",2007,1110396331,"Asia",64.698,2452.210407,65,"No",NA,"Low"
+"Indonesia",2007,223547000,"Asia",70.65,3540.651564,71,"Yes",NA,"High"
+"Iran",2007,69453570,"Asia",70.964,11605.71449,71,"Yes",NA,"High"
+"Iraq",2007,27499638,"Asia",59.545,4471.061906,60,"No",NA,"Low"
+"Ireland",2007,4109086,"Europe",78.885,40675.99635,79,"Yes",NA,"High"
+"Israel",2007,6426679,"Asia",80.745,25523.2771,81,"Yes",NA,"High"
+"Italy",2007,58147733,"Europe",80.546,28569.7197,81,"Yes",NA,"High"
+"Jamaica",2007,2780132,"Americas",72.567,7320.880262,73,"Yes",NA,"High"
+"Japan",2007,127467972,"Asia",82.603,31656.06806,83,"Yes",NA,"High"
+"Jordan",2007,6053193,"Asia",72.535,4519.461171,73,"Yes",NA,"High"
+"Kenya",2007,35610177,"Africa",54.11,1463.249282,54,"No",NA,"Low"
+"Korea Dem. Rep.",2007,23301725,"Asia",67.297,1593.06548,67,"No",NA,"High"
+"Korea Rep.",2007,49044790,"Asia",78.623,23348.13973,79,"Yes",NA,"High"
+"Kuwait",2007,2505559,"Asia",77.588,47306.98978,78,"Yes",NA,"High"
+"Lebanon",2007,3921278,"Asia",71.993,10461.05868,72,"Yes",NA,"High"
+"Lesotho",2007,2012649,"Africa",42.592,1569.331442,43,"No",NA,"Low"
+"Liberia",2007,3193942,"Africa",45.678,414.5073415,46,"No",NA,"Low"
+"Libya",2007,6036914,"Africa",73.952,12057.49928,74,"Yes",NA,"High"
+"Madagascar",2007,19167654,"Africa",59.443,1044.770126,59,"No",NA,"Low"
+"Malawi",2007,13327079,"Africa",48.303,759.3499101,48,"No",NA,"Low"
+"Malaysia",2007,24821286,"Asia",74.241,12451.6558,74,"Yes",NA,"High"
+"Mali",2007,12031795,"Africa",54.467,1042.581557,54,"No",NA,"Low"
+"Mauritania",2007,3270065,"Africa",64.164,1803.151496,64,"No",NA,"Low"
+"Mauritius",2007,1250882,"Africa",72.801,10956.99112,73,"Yes",NA,"High"
+"Mexico",2007,108700891,"Americas",76.195,11977.57496,76,"Yes",NA,"High"
+"Mongolia",2007,2874127,"Asia",66.803,3095.772271,67,"No",NA,"Low"
+"Montenegro",2007,684736,"Europe",74.543,9253.896111,75,"Yes",NA,"High"
+"Morocco",2007,33757175,"Africa",71.164,3820.17523,71,"Yes",NA,"High"
+"Mozambique",2007,19951656,"Africa",42.082,823.6856205,42,"No",NA,"Low"
+"Myanmar",2007,47761980,"Asia",62.069,944,62,"No",NA,"Low"
+"Namibia",2007,2055080,"Africa",52.906,4811.060429,53,"No",NA,"Low"
+"Nepal",2007,28901790,"Asia",63.785,1091.359778,64,"No",NA,"Low"
+"Netherlands",2007,16570613,"Europe",79.762,36797.93332,80,"Yes",NA,"High"
+"New Zealand",2007,4115771,"Oceania",80.204,25185.00911,80,"Yes",NA,"High"
+"Nicaragua",2007,5675356,"Americas",72.899,2749.320965,73,"Yes",NA,"High"
+"Niger",2007,12894865,"Africa",56.867,619.6768924,57,"No",NA,"Low"
+"Nigeria",2007,135031164,"Africa",46.859,2013.977305,47,"No",NA,"Low"
+"Norway",2007,4627926,"Europe",80.196,49357.19017,80,"Yes",NA,"High"
+"Oman",2007,3204897,"Asia",75.64,22316.19287,76,"Yes",NA,"High"
+"Pakistan",2007,169270617,"Asia",65.483,2605.94758,65,"No",NA,"Low"
+"Panama",2007,3242173,"Americas",75.537,9809.185636,76,"Yes",NA,"High"
+"Paraguay",2007,6667147,"Americas",71.752,4172.838464,72,"Yes",NA,"High"
+"Peru",2007,28674757,"Americas",71.421,7408.905561,71,"Yes",NA,"High"
+"Philippines",2007,91077287,"Asia",71.688,3190.481016,72,"Yes",NA,"High"
+"Poland",2007,38518241,"Europe",75.563,15389.92468,76,"Yes",NA,"High"
+"Portugal",2007,10642836,"Europe",78.098,20509.64777,78,"Yes",NA,"High"
+"Puerto Rico",2007,3942491,"Americas",78.746,19328.70901,79,"Yes",NA,"High"
+"Reunion",2007,798094,"Africa",76.442,7670.122558,76,"Yes",NA,"High"
+"Romania",2007,22276056,"Europe",72.476,10808.47561,72,"Yes",NA,"High"
+"Rwanda",2007,8860588,"Africa",46.242,863.0884639,46,"No",NA,"Low"
+"Sao Tome and Principe",2007,199579,"Africa",65.528,1598.435089,66,"No",NA,"Low"
+"Saudi Arabia",2007,27601038,"Asia",72.777,21654.83194,73,"Yes",NA,"High"
+"Senegal",2007,12267493,"Africa",63.062,1712.472136,63,"No",NA,"Low"
+"Serbia",2007,10150265,"Europe",74.002,9786.534714,74,"Yes",NA,"High"
+"Sierra Leone",2007,6144562,"Africa",42.568,862.5407561,43,"No",NA,"Low"
+"Singapore",2007,4553009,"Asia",79.972,47143.17964,80,"Yes",NA,"High"
+"Slovak Republic",2007,5447502,"Europe",74.663,18678.31435,75,"Yes",NA,"High"
+"Slovenia",2007,2009245,"Europe",77.926,25768.25759,78,"Yes",NA,"High"
+"Somalia",2007,9118773,"Africa",48.159,926.1410683,48,"No",NA,"Low"
+"South Africa",2007,43997828,"Africa",49.339,9269.657808,49,"No",NA,"Low"
+"Spain",2007,40448191,"Europe",80.941,28821.0637,81,"Yes",NA,"High"
+"Sri Lanka",2007,20378239,"Asia",72.396,3970.095407,72,"Yes",NA,"High"
+"Sudan",2007,42292929,"Africa",58.556,2602.394995,59,"No",NA,"Low"
+"Swaziland",2007,1133066,"Africa",39.613,4513.480643,40,"No",NA,"Low"
+"Sweden",2007,9031088,"Europe",80.884,33859.74835,81,"Yes",NA,"High"
+"Switzerland",2007,7554661,"Europe",81.701,37506.41907,82,"Yes",NA,"High"
+"Syria",2007,19314747,"Asia",74.143,4184.548089,74,"Yes",NA,"High"
+"Taiwan",2007,23174294,"Asia",78.4,28718.27684,78,"Yes",NA,"High"
+"Tanzania",2007,38139640,"Africa",52.517,1107.482182,53,"No",NA,"Low"
+"Thailand",2007,65068149,"Asia",70.616,7458.396327,71,"Yes",NA,"High"
+"Togo",2007,5701579,"Africa",58.42,882.9699438,58,"No",NA,"Low"
+"Trinidad and Tobago",2007,1056608,"Americas",69.819,18008.50924,70,"No",NA,"High"
+"Tunisia",2007,10276158,"Africa",73.923,7092.923025,74,"Yes",NA,"High"
+"Turkey",2007,71158647,"Europe",71.777,8458.276384,72,"Yes",NA,"High"
+"Uganda",2007,29170398,"Africa",51.542,1056.380121,52,"No",NA,"Low"
+"United Kingdom",2007,60776238,"Europe",79.425,33203.26128,79,"Yes",NA,"High"
+"United States",2007,301139947,"Americas",78.242,42951.65309,78,"Yes",NA,"High"
+"Uruguay",2007,3447496,"Americas",76.384,10611.46299,76,"Yes",NA,"High"
+"Venezuela",2007,26084662,"Americas",73.747,11415.80569,74,"Yes",NA,"High"
+"Vietnam",2007,85262356,"Asia",74.249,2441.576404,74,"Yes",NA,"High"
+"West Bank and Gaza",2007,4018332,"Asia",73.422,3025.349798,73,"Yes",NA,"High"
+"Yemen Rep.",2007,22211743,"Asia",62.698,2280.769906,63,"No",NA,"Low"
+"Zambia",2007,11746035,"Africa",42.384,1271.211593,42,"No",NA,"Low"
+"Zimbabwe",2007,12311143,"Africa",43.487,469.7092981,43,"No",NA,"Low"
diff --git a/exercises/day1part1_R-intro_exercises.R b/exercises/day1part1_R-intro_exercises.R
index d1c697c..508c429 100644
--- a/exercises/day1part1_R-intro_exercises.R
+++ b/exercises/day1part1_R-intro_exercises.R
@@ -256,7 +256,7 @@ table(gapminder07$lifeExp_over70)
 
 # Create a scatterplot with `lifeExp` on the y-axis and `gdpPercap` on the x-axis.
 
-
+x
 # Add a title and axis labels.