If x is a number that is 7 more than y, how do you express x as a function of y?

A. x = f (y) = 7 + x

B. x = f (y) = 7 + y

c. y = f (x) = 7x

D. y=f (x) = y-7

E. y=f (x) = 7+y

B.

Step-by-step explanation:

We are given x is a number that is 7 more than y.

This means when you add 7 to y you get x.

So the equation for this is 7+y=x.

We want x as a function of y. So we want to replace x with f (y).

This means we have the function 7+y=f (y) or f (y) = 7+y by symmetric property of equality.

Your answer is B.