Question

Find the x-intercepts of the parabola with vertex (-3,16) and y-intercepts (0,-20).
Write your answer in this form: (x1,y1), (x2,y2)
If necessary, round to the nearest hundredth.

Answer 1

What is the vertex form of a parabola?

Answer 2

(y-k)=a(x-h)^2

Answer 3

ok, replace h, k what do you have?

Answer 4

-3?

Answer 5

h = -3
and what about k?

Answer 6

k would be 16. right?

Answer 7

yup

Answer 8

so we have
y -16 = a(x + 3)^2

Answer 9

okay so what now?

Answer 10

you know have to find the value of a
you know that when x = 0 , y = -20 ( the y-intercept)

so how do you think we can find the value of a using these values of x and y ?

Answer 11

* you now

Answer 12

hmm. another one disappeared..