A proportional relationship is formed when y=16 and x=-4 what is the value of x when y=4?

-1

Step-by-step explanation:

The correct model to use for a proportional relationship is y = kx, where k is the constant of proportionality.

If y = 16 when x = - 4, then this model becomes 16 = k (-4). Solving for k, we get k = - 16/4, or k = - 4.

Thus, the specific formula to use here is y = - 4x.

Now if y = 4, 4 = - 4x, and x must therefore be x = - 1.