# style=h1: hyperbole I.

present=4
ranget=[-3:3]

a=!randitem 4,5,7,8,10
b=!randitem 4,5,7,8,10
c=3

ineq=$a*x^2-$b*y^2 < $c,\
 $a*x^2-$b*y^2 > $c,\
 $a*x^2-$b*y^2 < -$c,\
 $a*x^2-$b*y^2 > -$c

plotf=sqrt(($c+$b*t^2)/$a),t;,-sqrt(($c+$b*t^2)/$a),t;\
sqrt(($c+$b*t^2)/$a),t;,-sqrt(($c+$b*t^2)/$a),t;\
t,sqrt(($c+$a*t^2)/$b);,t,-sqrt(($c+$a*t^2)/$b);\
t,sqrt(($c+$a*t^2)/$b);,t,-sqrt(($c+$a*t^2)/$b);

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

