EquationDefiningFunction1

Answer is an Equation Defining a Function

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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)

• Download file: File:EquationDefiningFunction1.txt (change the file extension from txt to pg when you save it)
• File location in NPL: FortLewis/Authoring/Templates/Algebra/EquationDefiningFunction1.pg

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PG problem file	Explanation
Problem tagging data	Problem tagging:
DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "parserAssignment.pl", ); TEXT(beginproblem());	Initialization: We need to include the macro file parserAssignment.pl.
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.html
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:

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