Question

Write an equation of the parabola in intercept form that passes through (−18, 72) with x-intercepts of −16 and −2.

Answer 1

y = a(x + 16)(x + 2)

72 = a(-18 + 16)(-18 + 2)

72 = a(-2)(-16)

72 = a(32)

`(72)/(32) = a`

`(9)/(4) = a`

Answer: y =
`(9)/(4)`(x + 16)(x + 2)