lijn:

cirkel:

a = 1 (slider from -5 to 5, step 0.01)
b = 0 (slider from -5 to 5, step 0.01)
p = 0 (slider from -5 to 5, step 1)
q = 0 (slider from -5 to 5, step 1)
r = 1 (slider from 0 to 5, step 0.01)
c: y = a x + b
d: (x - p)^(2) + (y - q)^(2) = r^(2)
T1: "y = " + a + "x + " + b
T3: "(x-" + p + ")^2+(y-" + q + ")=" + r + "^2"