Question

Rewrite x - 2y = 8 using function notation.

Answer 1

Isolate for y.
x - 2y =8
x-8 = 2y
(x-8)/(2) = y
(x/2) - (8/2) = y
y = (1x/2) - (4)

f(x) = (1/2)x - 4
The answer is D.

Answer 2

Answer:

D) $\displaystyle f(x) = \frac{1}{2}x - 4$

Step-by-step explanation:

x - 2y = 8

- x - x

________

$\frac{-2y}{-2} = \frac{-x + 8}{-2} \\ \\ y = \frac{1}{2}x - 4 → f(x) = \frac{1}{2}x - 4$

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