[saved-setup]
[labels]
xaxis=x
yaxis=y

[grid]
left=-8
right=8
top=auto
bottom=auto

[options]
detail=grid
axes=1808

[equations]
y=a(x-b)^2+c {a: -15,15,2} {b: 0} {c: 0}
y=a(x-b)^2+c {a: -5,5,2} {b: -2} {c: -1}
y=a(x-b)^2+c {a: -5,5,2} {b: -2} {c: 1}
y=a(x-b)^2+c {a: -5,5,2} {b: -2} {c: 0}
y=a(x-b)^2+c {a: -5,5,2} {b: 2} {c: 0}
y=a(x-b)^2+c {a: -5,5,2} {b: 0} {c: 0}