Question

If p varies directly with q, and p = 8 when q = 2, what is the value of p when q = 7?

A.
p = 28

B.
p = 40

C.
p = 1

D.
p = 100

Answer 1

7 is 350% of 2

Answer 2

so what is 350% of 8

Answer 3

So the formula for direct variation is p = kq, where k is the constant by which it varies. In your given case, 8 = k(2), so solving for k, one gets k = 4. Now given a new value q, what do you do?

Answer 4

28

Answer 5

@ShelbyWyatt You are not wrong.

@sissyedgar That is correct!

Answer 6

yes

Answer 7

Yay!
Thank you both!