EquationDefiningFunction1
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Answer is an Equation Defining a Function
This PG code shows how to check student answers that are equations that define functions. If an equation defines a function, it is much more reliable to use the this method of answer evaluation (via parserAssignment.pl
) than the implicit equation method (via parserImplicitEquation.pl
)
 File location in OPL: FortLewis/Authoring/Templates/Algebra/EquationDefiningFunction1.pg
 PGML location in OPL: FortLewis/Authoring/Templates/Algebra/EquationDefiningFunction1_PGML.pg
PG problem file  Explanation 

Problem tagging: 

DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "parserAssignment.pl", ); TEXT(beginproblem()); 
Initialization:
We need to include the macro file 
Context("Numeric")>variables>are(x=>"Real",y=>"Real"); parser::Assignment>Allow; parser::Assignment>Function("f"); $eqn = Formula("y=5x+2"); $fun = Formula("f(x)=3x^2+2x"); 
Setup: We must allow assignment, and declare any function names we wish to use. For more details and examples in other MathObjects contexts, see parserAssignment.pl 
Context()>texStrings; BEGIN_TEXT Enter \( y = 5x+2 \) \{ ans_rule(20) \} $BR $BR Enter \( f(x) = 3x^2+2x \) \{ ans_rule(20) \} END_TEXT Context()>normalStrings; 
Main Text: The problem text section of the file is as we'd expect. 
$showPartialCorrectAnswers = 1; ANS( $eqn>cmp() ); ANS( $fun>cmp() ); 
Answer Evaluation: As is the answer. 
Context()>texStrings; BEGIN_SOLUTION ${PAR}SOLUTION:${PAR} Solution explanation goes here. END_SOLUTION Context()>normalStrings; COMMENT('MathObject version.'); ENDDOCUMENT(); 
Solution: 