What is the inverse for the function? y = 2x + 3

Y = 2x + 3

Let y = f (x), solving for the inverse function is solving for x

y = 2x + 3

2x + 3 = y

2x = y - 3

x = (y - 3) / 2

Recall that y = f (x), that implies that x = f⁻¹ (y)

x = (y - 3) / 2, substitute x = f⁻¹ (y)

f⁻¹ (y) = (y - 3) / 2

if f⁻¹ (y) = (y - 3) / 2, then: Replace the y with x.

f⁻¹ (x) = (x - 3) / 2

for

y

y

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f

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1

(

x

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=

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