Question

WILL MEDAL! :) The diagram below represents which function?
http://www.thelearningodyssey.com/Assess/DPT/QIEImagesStorage/HSCT_/HSCT_A213A_13A_stem2_1.gif

Answer 1

\[a) y=x ^{2}-5\]

Answer 2

\[b) y=x ^{2}+5\]

Answer 3

nevermind

Answer 4

\[y=5x ^{2}\]

Answer 5

\[y=-5x ^{2}\]

Answer 6

Consider it like a domain - range thing

Domain = x
Range = y

So basically when we have x = 4 or x = -4...we should get y = 11
When x = -2 or 2 we should get y = -1

So basically what it is saying is...take one of your choices...example

A) y = x^2 - 5

If we plug in x = -4...and since -4 corresponds to a 'y' of 11....do we get that?

y = x^2 - 5
y = (-4)^2 - 5
y = 16 - 5
y = 11

Okay good....so 1 checks off..now we just check the other possible choices with this same equation

What happens when you plug in 2 into this equation? do you get -1? etc...