Description
Accepts an equation (two formulas
separated by an
=
sign) as an answer.
Notes
- One side of the correct given answer must
be in the form of a single variable only (such as
y=...
or ...=z
). However, the
student's response does not have this limitation - any
equivalent equation will be graded as correct.
- The
\answer
field must be in calculator
syntax, NOT in TeX.
Examples
\begin{question}{Equation}
\qutext{Find the equation of the line that passes though the points
$(-3,4)$ and $(6,1)$.}
% One side of the answer given must be a single variable:
\answer{y=-x/3+3}
% Note that the response 'y-1=-(x-6)/3' would also be graded as correct.
\end{question}
\begin{question}{Equation}
% This question uses algorithmic variables.
\qutext{Find the equation of the line that is parallel to the line
$y=\var{m}x+\var{b}$ and that passes through the point
$(\var{c},\var{d})$.}
\answer{y=\var{m}x\var{sgn}\var{e}}
\code{$m1 = range(2,20);
$m = int(if(rint(2),$m1,-$m1));
$b = range(1,20);
$c = range(-10,10);
$d = range(-10,10);
$e1 = int($d-$m*$c);
$sgn = switch(lt($e1,0),"+","-");
$e = int(abs($e1));}
% The above code chooses random integer coefficients m and b, and a
% random point (c,d). The y-intercept e is calculated, and care is
% taken to display the answer correctly since e may be positive or
% negative.
\end{question}