Question

What is the y-intercept of the quadratic function f(x) = (x – 8)(x + 3)?

Answer 1

f(x) = (x – 8)(x + 3)?

We can re-write this equation as:

y = (x – 8)(x + 3)

At the y-intercept, x = 0

Put x = 0 in the above equation


y = (0 – 8)(0 + 3)

y = (-8)(3)

y = -24

The y-intercept is -24


and the point where the curve cuts the y-axis is (0, -24)

Answer 2

At y-axis the curve cuts the point at (0,-24)

Given:

f(x) = (x - 8)(x + 3)?

To find:

The “y-intercept” of the “quadratic function”

Answer:

F(x) = (x - 8)(x + 3)?

We can rewritten above equation as

F(y ) = (x - 8)(x + 3) …...(1)

At the “y-intercept”, x = 0

Substitute x value in equation 1

y = (0 - 8)(0 + 3)

y = (-8) (3)

y = -24

Y-intercept is -24