updated dev container; updated proteus 1-2 figure

.devcontainer/devcontainer.json

@@ -13,7 +13,7 @@
 //
 ///////////////////////////////////////////////////////////////
 {
-  "image": "oscarlevin/pretext:latest",
+  "image": "oscarlevin/pretext:1.1",
   "features": {},
 
   // Comment or uncomment lines below if you don't or do need that feature.

source/proteus/proteus-1-2.xml

@@ -17,7 +17,7 @@
 <title>PROTEUS exercises</title>
 
     <p>
-    As noted in <xref ref="PA-1-2" text="type-global"/>, we are interested in studying the behavior of the output of a function as the input value gets closer and closer to a specified chosen number.  One way to visualize this process is to think about a tiny bug walking along the graph of a function, as pictured here:
+    As noted in <xref ref="PA-1-2" text="type-global"/>, we are interested in studying the behavior of the output of a function as the input value gets closer and closer to a specified chosen number.  One way to visualize this process is to think about a tiny ant walking along the graph of a function, as pictured here:
     </p>
   <figure xml:id="Fig-PA-1-2-und-limits">
     <caption>Piecewise graph with point. <m>T(s)</m>.</caption>
@@ -35,7 +35,7 @@
             <graph function="k" domain="(2,5)"/>
           <definition>f(x) = chi_oc(-5,-1,x)*g(x) + chi_co(-1,5,x)*h(x) </definition>
               <point p="(a,f(a))" alignment="nw" clear-background="yes">
-              BUG
+              ANT
               </point>
               <point p="(2,f(2))" fill="white"/>
               <point p="(-1,f(-1))" fill="blue" />
@@ -53,11 +53,11 @@
   <exercise component="proteus" label="proteus-und-limits-1"  xml:id="proteus-und-limits-1" attachment="yes">
     <statement>
     <p>
-      Focusing on the bug, the <m>x</m>-value that the bug is directly above is the input value to the function, and the <m>y</m>-value at the bug's height (directly across from the bug) is the corresponding output value of the function.  In the figure here, the bug's position corresponds approximately to the point <m>(1.6, f(1.6)) = (1.6, 2.6).</m>
+      Focusing on the ant, the <m>x</m>-value that the ant is directly above is the input value to the function, and the <m>y</m>-value at the ant's height (directly across from the ant) is the corresponding output value of the function.  In the figure here, the ant's position corresponds approximately to the point <m>(1.6, f(1.6)) = (1.6, 2.6).</m>
     </p>
 
     <p>
-      If the bug is at the point on the graph directly above <m>x=3</m> what is the bug's height?  In other words, what is the corresponding <m>y</m>-value, <m>y = f(3)</m>?
+      If the ant is at the point on the graph directly above <m>x=3</m> what is the ant's height?  In other words, what is the corresponding <m>y</m>-value, <m>y = f(3)</m>?
     </p>
     </statement>
      <response />
@@ -66,7 +66,7 @@
   <exercise component="proteus" label="proteus-und-limits-2"  xml:id="proteus-und-limits-2" attachment="yes">
     <statement>
     <p>
-      If the bug walks along the curve in such a way that it gets closer and closer to the location where <m> x = 2 </m>, what happens to the <m>y</m>-value that corresponds to the bug's height?  Does it matter if the bug approaches the location where <m> x = 2 </m> from either the left side or the right side of <m> x = 2 </m>?  Discuss what you see on the graph near the point where <m>x = 2</m>.
+      If the ant walks along the curve in such a way that it gets closer and closer to the location where <m> x = 2 </m>, what happens to the <m>y</m>-value that corresponds to the ant's height?  Does it matter if the ant approaches the location where <m> x = 2 </m> from either the left side or the right side of <m> x = 2 </m>?  Discuss what you see on the graph near the point where <m>x = 2</m>.
     </p>
 
     </statement>
@@ -76,7 +76,7 @@
   <exercise component="proteus" label="proteus-und-limits-3"  xml:id="proteus-und-limits-3" attachment="yes">
     <statement>
     <p>
-      Finally, what happens if the bug walks in such a way that the corresponding <m>x</m>-value gets closer and closer to <m>x = -1</m>?  What do you notice about the corresponding output values of the function near the point where <m>x = -1</m>?
+      Finally, what happens if the ant walks in such a way that the corresponding <m>x</m>-value gets closer and closer to <m>x = -1</m>?  What do you notice about the corresponding output values of the function near the point where <m>x = -1</m>?
     </p>
     </statement>
      <response />