Answer:
y/x= -8/-2= 4 => when y=32 => 32/x=4 => x=8
I think you add the exponents im not sure haven't done it in long time
A function is a relation that associates each element x of a set X, to a single element y of another set Y.
Circle is not a function of x. For x = 0 we have y = -7 and y = 7.