Question

Which equation is the inverse of the function f(x)=5x+2?

y = 5x - 2

y = 2/5x + 1

y = 1/5x - 1/2

y = 1/5x - 2/5

Answer 1

The inverse is y=1/5x-2/5
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f(x)=5x+2

Replace f(x) with y

y=5x+2

Interchange the variables.

x=5y+2

Solve for y

y=-2/5+x/5 which is the same.d y=1/5x-2/5