update alt text format and BEGIN_SOLUTION

Author: Tanaquil18

OpenProblemLibrary/Michigan/Chap2Sec3/Q09.pg

@@ -94,7 +94,7 @@ Consider the function \(f(x)\) shown in the graph below.
 $BR
 $BCENTER
 \{ image( insertGraph($gr), tex_size=>500, height=>250, width=>250,
-	  extra_html_tags=>'alt="graph of a function"' ) \}
+	  alt=>"Graph of a function" ) \}
 $BR
 ${BITALIC}(Note that you can click on the graph to get a larger version of
 it, and that it may be useful to print that larger version to be able to
@@ -125,8 +125,7 @@ foreach my $d ( @derivs ) {
 # ANS(num_cmp( [@derivs], 'tol'=>0.25 ) );
 
 Context()->texStrings;
-SOLUTION(EV3(<<'END_SOLUTION'));
-$PAR SOLUTION $PAR
+BEGIN_SOLUTION
 
 At each value of \(x\), we estimate the derivative by estimating the 
 slope (=rise/run) from the graph.  This allows us to both sketch the