Rewrite the following equation as a function of x.

4x+8y-28=0

f (x) = - 2y+7

Step-by-step explanation:

4x+8y-28=0

Add 28 to each side

4x+8y-28+28=28

4x+8y = 28

Subtract 8y from each side

4x + 8y-8y = 28-8y

4x = - 8y+28

Divide by 4

4x/4 = -8y/4+28/4

x = - 2y+7

f (x) = - 2y+7

A function is written in terms of f (x).

4x+8y-28=0

Subtract 4x from each side and add 28 to each side:

8y = - 4x + 28

Divide each term by 8:

y = - x/2 + 7/2

rewrite as a function:

f (x) = - x/2 + 7/2