Question

Variable y varies directly with x^2, and y = 196 when x = 7.



Enter the constant of variation in the quadratic variation equation.



y = x2

Answer 1

y=kx

That is your formula for direct variation.

y=x^2

Given that y=196, and x=7.

196=(7^2)(K)

Just solve for k, or the constant.

Answer 2

How would i solve for "K"

Answer 3

@dtan5457

Answer 4

Well, I mean I plugged everything in for you.

196=49(k)

What would k be to make the equation true?

Answer 5

4?

Answer 6

@dtan5457

Answer 7

Yes, 4 would be your constant.

Answer 8

Okay, So how would I put it in?

Answer 9

Not sure what your asking.

y=kx

y and x is given.

k is 4.

Answer 10

y=___x^2 so does 4 go where the ___ is?

Answer 11

y=4x^2

Answer 12

Thank you

Answer 13

Can you help with this? http://brainly.com/question/264009

Answer 14

Welcome. Feel free to fan and medal if that helped. Tag me in any more questions if needed.

Answer 15

Sure, give me a sec,

Answer 16

Thank you so so so much!

Answer 17

Well this function says that

y=x^2

y=18, x=6

18=k(6^2)

18=k(36)

What is k?

Answer 18

Or, what times 36 equals 18?

Answer 19

2?

Answer 20

Haha, it's 1/2.

36 x 2=72

36 x 1/2=18

Answer 21

So now that you have 1/2.

Your function is now

y=1/2x^2

Answer 22

OHHH okay!!! So what graph is it?

Answer 23

b?

Answer 24

Well if the function is

y=1/2x^2

What do you think?

It's easy if you plug in any x value and see if the y value comes out as the graph you think it is..

Answer 25

B?

Answer 26

Yes :)

Answer 27

Yay!!! thank you!!!

Answer 28

No problem. Tag me in anymore questions if you have any.

Answer 29

Okay thank you:)