Question

Rewrite x - 2y = 8 using function notation. A) x - 2f(x) = 8 B) f(x) = -x + 8 C) f(x) = 2x + 8 D) f(x) = 1 2 x - 4

Answer 1

that would be f(x) =  1/2 x - 4

Answer 2

D

Explanation:

A first order equation has the following format:

`y = ax + b`

In function notation, we use y = f(x), so:

`f(x) = ax + b`

In this problem:

x - 2y = 8

(-2y = 8 - x)*(-1)

2y = x - 8

y = (1/2)x - 4

f(x) = (1/2)x - 4

So the correct answer is

D