# style=h2: hyperbole II.

present=4
ranget=[-2:2]

a=!randitem 7,8,10,11
c=3
b=$[$c/$a]

ineq=$a*x*y < $c,\
$a*x*y > $c,\
$a*x*y < -$c,\
$a*x*y > -$c

plotf=exp(t),$b*exp(-t);,-exp(t),-$b*exp(-t);\
exp(t),$b*exp(-t);,-exp(t),-$b*exp(-t);\
exp(t),-$b*exp(-t);,-exp(t),$b*exp(-t);\
exp(t),-$b*exp(-t);,-exp(t),$b*exp(-t);

sh=!shuffle $present
ineq=!item $sh of $ineq
plotf=!line $sh of $plotf

