The function m is given in three equivalent forms. Which form most quickly reveals the y-intercept?
A: m(x) = 4(x-1)^2 - 36
B: m(x) = 4(x+2)(x-4)
C: m(x) = 4x^2 - 8x - 32

What is the y-intercept?
y-intercept = (0, ?)