Punkte an

W_1 = Point(yAxis)
X = (0, 10.5)
T = (-1, 2)
W = (0, 1)
P = (-3, 1.5)
a = true
y_s = 2.9 (slider from -5 to 5, step 0.1)
x_s = -4 (slider from -5 to 5, step 0.1)
f(x) = (x - x_s)^(2.0) + y_s