find the inverse function: 4x-2y=8

(hint: let x and y change places and solve for y)
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1 Answer

4x - 2y = 8
2y = 4x - 8
y = 2x - 4
f(x) = 2x - 4

Let f(x) = y. We have:

y = 2x - 4
y + 4 = 2x
x = (y + 4) / 2
f^-1 (x) = (x + 4) / 2

Hence, the inverse function is f^-1 (x) = (x + 4) / 2
by

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