#DESCRIPTION
##  Algebra problem: function definition
##ENDDESCRIPTION

##KEYWORDS('algebra', 'function', 'definition')

DOCUMENT();        # This should be the first executable line in the problem.

loadMacros(
"PG.pl",
"PGbasicmacros.pl",
"PGchoicemacros.pl",
"PGanswermacros.pl",
"PGgraphmacros.pl"
);

TEXT(beginproblem());

$showPartialCorrectAnswers = 1;

$a = random(2,25,1);
$b = random(2,25,1);

BEGIN_TEXT
Express the rule "Multiply by $a, then add $b" as the function
$BR$BR
\(f(x)=\) \{ans_rule(15)\}.
$BR
END_TEXT

$ans1 = "$a*x+$b";

ANS(fun_cmp($ans1));

ENDDOCUMENT();        # This should be the last executable line in the problem.