Difference between revisions of "EquationDefiningFunction1"
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m (moved LinearEquationAnswer1 to EquationDefiningFunction1) |
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| Line 67: | Line 67: | ||
$eqn = Formula("y=5x+2"); |
$eqn = Formula("y=5x+2"); |
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| − | $f = Formula("f(x)= |
+ | $f = Formula("f(x)=3x^2+2x"); |
</pre> |
</pre> |
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</td> |
</td> |
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| Line 86: | Line 86: | ||
Enter \( y = 5x+2 \) \{ ans_rule(20) \} |
Enter \( y = 5x+2 \) \{ ans_rule(20) \} |
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$BR |
$BR |
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| − | Enter \( f(x) = |
+ | Enter \( f(x) = 3x^2+2x \) \{ ans_rule(20) \} |
END_TEXT |
END_TEXT |
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</pre> |
</pre> |
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Revision as of 23:00, 30 November 2010
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)
- Download file: File:LinearEquationAnswer1.txt (change the file extension from txt to pg)
- File location in NPL:
NationalProblemLibrary/FortLewis/Authoring/Templates/Algebra/LinearEquationAnswer1.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");
$f = 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 |
BEGIN_TEXT
Enter \( y = 5x+2 \) \{ ans_rule(20) \}
$BR
Enter \( f(x) = 3x^2+2x \) \{ ans_rule(20) \}
END_TEXT
|
Main Text: The problem text section of the file is as we'd expect. |
ANS( $eqn->cmp() ); ANS( $f->cmp() ); ENDDOCUMENT(); |
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: |
