The variables x and y vary directly. use the values to find the constant of proportionality and write an equation that relates x and y. y=8; x=2

y = 4x

Step-by-step explanation:

If y is directly proportional to x (which is what I assume you are meaning in this question), this means that

y = kx, where k is the constant of proportionality.

To find k, we simply substitute in the given x and y values, and solve for k. i.e we to get:

8 = k x 2.

k = 8/2 = 4.  

so y = 4x

9x

your answer is -9

step-by-step explanation: