Question

How to solve for the y intercept of f(x)=4(x+2)(x+4)(x-7)

Answer 1

The y-intercept is (0, -224).

Explanation:

• Since the y-intercept lies directly on the y-axis, the x-coordinate for it is always 0.

Thus, we can substitute 0 for x to find the y-intercept:

f(0) = 4(0 + 2)(0 + 4)(0 - 7)

f(0) = 4(2)(4)(-7)

f(0) = (8)(4)(-7)

f(0) = (32)(-7)

f(0) = -224

Thus, the y-intercept is (0, -224).