Question

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

Answer 1

the answer is x = f(y) = 7 + y

Explanation:

Answer 2

B.

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.