Question

Variable y varies directly with x2, and y = 32 when x = 4.

Which graph represents the quadratic variation?

Answer 1

@bohotness Hi can you help?

Answer 2

@Data_LG2 Help?

Answer 3

yes

Answer 4

Thank you, it's either A or C right?

Answer 5

which one do you think is that answer?

Answer 6

C?

Answer 7

think you right i

Answer 8

So is it C or..

Answer 9

It was not C. :/

Answer 10

Hi :)

I cannot see the graph properly, so you have to work with me.

your question says y varies directly to \(\sf x^2\), so you'll have \(\sf y=ax^2\), where a is the constant of variation.

Using the point you were given, (4 , 32), we can solve for the value of 'a'.

\(\sf y=ax^2\\ 32=a(4)^2 \\ 32 =16 a\\ a= 2 \)

therefor you're equation will be : \(\sf y=2x^2\)

Now try plugging in different values for x to solve for y, and match the points that you have gathered on one of the graphs in the choices.

Answer 11

**therefore

Answer 12

**your pardon for my typos T-T

Answer 13

That's fine. I got it wrong though. It was A :(

Answer 14

Never try to guess your answers, you have to know how to get it so that you'll learn.