Question

need help with multiple graphing please.

Answer 1

Can you graph y = 3x^2?

Answer 2

Do I just plug a number in x, and solve for y?

Answer 3

Yes. It will be a parabola. Choose --1, 0, 1 for x and graph it

Answer 4

(-1, 3), (0, 0), (1, 3)

Answer 5

Yes.

Answer 6

Now y = 3x^2-(-5)=3x^2+5 So the +5 moves the graph up 5
y=3x^2-1 is the same graph moved down one
y=3x^2-5 is the original graph moved down 5

Answer 7

ok so I know the bottom of the parabola goes up 5 down 5 and up 1 but what about the sides?

Answer 8

In your original graph, when you went 1 to the right, you went up 3. The new graphs will be the same.

Answer 9

oh ok so move all points up that way. thamks

Answer 10

Ok so I graphed it and says wrong. Did I miss something?

Answer 11

Read my earlier post: y=3x^2-1 moves the original graph down 1

Answer 12

Ah yeah got it thanks again. =p

Answer 13

yw