Question

The graph of y = x2 is shown below.

Answer 1

If graphed on the same grid, which of the following could be the graph of y = 0.4x2?

Answer 2

what do you think?

Answer 3

B but that is based of nothing really >.<

Answer 4

you mean x^2 its raised to the 2nd power right?

Answer 5

so a number in front of the variable means it's stretching or compressing? I kind of forgot

Answer 6

its one of the two in the middle. I think its stretching by .4 so it would be graph three

Answer 7

http://www.youtube.com/watch?v=ue9UoYz4cPI

Answer 8

..... lol i don' know either
i made a type tho its written as y = 0.4x^2 in the book

Answer 9

it is graph three.

Answer 10

On the first one the coefficient would have to be negative

Answer 11

On the second one the coefficient would have to be greater than one.

Answer 12

On the fourth one the coefficient would have to be negative and greater than 1.

Answer 13

So graph three looks like it is the only one that will work for this equation.

Answer 14

Is there any rule say why i mean like is there a name or is it something like general knowledge?

Answer 15

should be in your text book

Answer 16

Not that I know of

Answer 17

doclav the number in front of the variable represents stretch or compress right

Answer 18

Sorry it's b because of vertical stretch

Answer 19

Have you done that yet? Where you learn about vertical stretch, compression, horizontal shifts etc?

Answer 20

Yes to a point but i don't really get it

Answer 21

Since it would take me forever to explain because there's a lot to it, give this a read, it will definitely help you out http://www.purplemath.com/modules/fcntrans.htm