Use cross products to solve the proportion. StartFraction 4 over 3 EndFraction = StartFraction x over 12 EndFraction 1. Use cross products: (4)(12) = 3x 2. Multiply: 48 = 3x 3. Divide both sides by 3: = x

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

step-by-step explanation:

where is the question is there is a formula or is there not one

mrbilldoesmath!

answer: a parabola

steps:

(x-1)(x+4)   = x(x+4) - 1(x+4) = (x^2 + 4x) - (x+4)

                = x^2 +4x -x -4   = x^2 +3x -4

which is a parabola

mrb