Author an equation sub-type
This sub-type is authored by selecting the Equation option from the Sub-type drop-down list during mathematical formula question authoring.
Examples of accepted syntax for defining the Answer field value for this sub-type are:
x = 1 - 2yy = 4*(x+1) +2y = 8*(x-2) + 7
The equation sub-type Answer field:
Accepts the use of an "
=" sign in the correct answer.Accepts any equation that's algebraically equivalent to the correct answer as an equivalent response.
Requires the correct answer expression to have only a single variable on the left-hand side of the equation and a formula that doesn't involve that variable on the right-hand side (an implicit formula can't be specified).
Example of this sub-type
Question statement:
What is the equation of the straight line passing through the point (2, 7) with slope 8?
Answer field syntax:
y = 8*(x-2) + 7
Example of this sub-type with an algorithm
Question statement:
What is the equation of the straight line passing through the point ($xone, $yone) with a slope $m?
Algorithm:
$xone = rint(-10,10);
$yone = decimal(1, rand(-10,10));
$m = rint(2, 10);
Answer field syntax:
y = $m*(x-$xone) + $yone