Find the inverse of the function f(x) = mx + b, where m cannot equal 0.
Follow Math Help Forum on Facebook and Google+
Originally Posted by magentarita Find the inverse of the function f(x) = mx + b, where m cannot equal 0. Let $\displaystyle y=mx+b$ Rearrange to make $\displaystyle x$ the subject, so you will get: $\displaystyle x = \frac{y-b}{m}$ This is your inverse. Remember to change it back to correct format, which is: $\displaystyle f'(x) = \frac{x-b}{m}$
I should have tried harder. The question is all too easy. Thanks Air. Rita
I always use a simple trick to remember inverse functions, especially with linear equations: A function's slope times the inverse of that functions slope equals -1
Thanks for Rule of Thumb.
View Tag Cloud