Question

Use the graph to write an equation for the parabola.

Answer 1

where is the graph?

Answer 2

@Kamille

Answer 3

Sorry thought ive attached it.

Answer 4

no problem : ) So, can you tell me 3 points which are in the parabola and you can easily see them?

Answer 5

is one of it -3, 2?

Answer 6

Well, actually it is not exatly on (-3;2), but (-2;2) is easily seen. Do you agree?

Answer 7

Yes

Answer 8

another is (2;2), right? And the last?

Answer 9

So the other is 2,2 ?

Answer 10

I don't know the last point is at..is it in the center?

Answer 11

yes, it is (0;0)

Answer 12

Ohh okay.

Answer 13

so, you have three points:
(0;0)
(-2;2)
(2;2)

Also, you should know that main formula of a parabola is\[y=a ^{2}+bx+c\]

So, you have three points. So you can make a system of eq. Do you have any ideas how to do it? (think about points and formula of a parabol

Answer 14

Do I place the points where the a^2 and bx and c is?

Answer 15

OMG!!! I have told you wrong points, sorry!!!! Looked wronngly :/ So your points are (0;0) (-2;1) (2;1) sorry!!!

Answer 16

oh.

Answer 17

no. Do you know, that (x;y) means a point, right? so you have

(0;0) (x=0;y=0)
(2;1) (x=2;y=1)
(-2;1)(x=-2;y=1) so you need to put these numbers in the formula (insert value of x where is "x", and value of y where is "y"). So you get a system of eq: