Fix bug 4687

Author: gajennings

OpenProblemLibrary/AlfredUniv/anton8e/chapter2/2.4/prob3.pg

@@ -75,7 +75,7 @@ push(@output, spf( f1($x1+$i*$dh) , "%12.8g")     );
 
 # Present the text.
 TEXT(EV2(<<EOT));
-Given the following table:
+Let \(f\) be a continuous function that's defined on some interval.  The following table gives some values of \(f\) at points on that interval:
 EOT
 
 TEXT(
@@ -93,7 +93,11 @@ $INPUTSPACE = M3( qq! \\rule{${len}in}{.01in}!,
 Context()->texStrings;
 #TEXT(EV2(<<EOT));
 BEGIN_TEXT
-Use the table to find the largest \(\delta\) so that \(\vert f(x)-f($x1)\vert <$epsilon\) when \(\vert x-$x1\vert < \delta\).
+Assume the values in the table are typical values of \(f\), so the graph of \(f\) stays fairly close to a polygon connecting connecting consecutive points in the table, without wiggling wildly between them.
+
+$PAR
+Use the table to find a good approximation of the largest \(\delta\) so that \(\vert f(x)-f($x1)\vert <$epsilon\) when \(\vert x-$x1\vert < \delta\).  
+
 $BR
 \(\delta = \)\{ans_rule(20) \} 
 $PAR