13. -4 + 7x + 4 = 3y Find the constant of variation.

Question

Someone help, I can't understand how to do it. None of the websites I look up have good explanations, help?

Answer 1

well, you have

7x = 3y
y = 7/3 x

7/3 is the constant of variation.

when one says y varies directly with x, it means that there is a constant k such that

y = kx

If y varies inversely as x, then there is k such that

xy = k or, y = k/x

These can be combined, so that if you hear

y varies directly as x and inversely as the square of w, it means

y = kx/w^2

Answer 2

Thank you! You actually explained it perfectly! Now I can get my homeowork done :3