Difference between revisions of "PointAnswers1"
(Created page with '<h2>Answer is a Point or a List of Points</h2> <p style="background-color:#eeeeee;border:black solid 1px;padding:3px;"> This PG code shows how to evaluate answers that are point…') |
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"PGstandard.pl", |
"PGstandard.pl", |
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"MathObjects.pl", |
"MathObjects.pl", |
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| + | "AnswerFormatHelp.pl", |
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"contextLimitedPoint.pl", |
"contextLimitedPoint.pl", |
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); |
); |
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points as if they were vectors). The x-intercepts are clearly a |
points as if they were vectors). The x-intercepts are clearly a |
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list of points. We used a list with only one element for the y-intercepts |
list of points. We used a list with only one element for the y-intercepts |
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| − | so that a student who mistakenly enters two points will |
+ | so that a student who mistakenly enters two points will be told |
| − | + | their second point is incorrect. If we did not use a list for |
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| + | the y-intercepts, a student who enters two points would be given |
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| + | an error message instead. |
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</p> |
</p> |
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</td> |
</td> |
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<p> |
<p> |
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<b>Main Text:</b> |
<b>Main Text:</b> |
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| + | Be sure to tell students the proper syntax for how to enter their answers. |
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</p> |
</p> |
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</td> |
</td> |
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Revision as of 23:58, 1 December 2010
Answer is a Point or a List of Points
This PG code shows how to evaluate answers that are points or lists of points.
- Download file: File:PointAnswers1.txt (change the file extension from txt to pg when you save it)
- File location in NPL:
NationalProblemLibrary/FortLewis/Authoring/Templates/Precalc/PointAnswers1.pg
| PG problem file | Explanation |
|---|---|
|
Problem tagging: |
|
DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "AnswerFormatHelp.pl", "contextLimitedPoint.pl", ); TEXT(beginproblem()); |
Initialization:
We only need to load |
Context("LimitedPoint");
$f = Compute("x^2-1");
$xint = List( Point("(1,0)"), Point("(-1,0)") );
$yint = List( Point("(0,-1)") );
|
Setup:
We could have used |
Context()->texStrings;
BEGIN_TEXT
Enter the x-intercept(s) and y-intercept(s)
of \( y = $f \). Enter a point as \( (a,b) \),
including the parentheses. If there is more
than one correct answer, enter a comma
separated list of points.
$BR
$BR
x-intercept(s): \{ ans_rule(20) \}
\{ AnswerFormatHelp("points") \}
$BR
y-intercept(s): \{ ans_rule(20) \}
\{ AnswerFormatHelp("points") \}
END_TEXT
Context()->normalStrings;
|
Main Text: Be sure to tell students the proper syntax for how to enter their answers. |
$showPartialCorrectAnswers = 1; ANS( $xint->cmp() ); ANS( $yint->cmp() ); |
Answer Evaluation: |
Context()->texStrings;
BEGIN_SOLUTION
${PAR}SOLUTION:${PAR}
Solution explanation goes here.
END_SOLUTION
Context()->normalStrings;
COMMENT('MathObject version.');
ENDDOCUMENT();
|
Solution: |
