type f(x)=kx

type f(x)=x²+k

type f(x)=k

type f(x)=kx²

A1 = 30
B1 = 50
C1 = 90
D1 = 110
E1 = 130
A2 = 4.5
B2 = 12.5
C2 = 40.5
D2 = 60.5
E2 = 84.5
A: (A1, A2)
B: (B1, B2)
C: (C1, C2)
D: (D1, D2)
k = 0.009 (slider from 0 to 0.01, step 0.001)
f2(x) = 50 * k * x
f1(x) = x^(2) + 1000 * k
f3(x) = 1000 * k
f4(x) = k * x^(2)