If y varies directly as x, and y=42 when x=8. What if the value of x when y=252.

Question

Answer needs to be in x= form

Answer 1

Hi Seleste!

So if y varies directly as x, and y=42 when x=8 that means that the constant of variation is k=5.25

If k=5.25 then the equation to describe the direct variance would be

y=5.25x

input the known value of y to get:

252= 5.25x

divide both sides by 5.25 to solve for x:

252/5.25=5.25/5.25x

leaving you with the answer:

x=48

Hope this helps!

Makenna