Class Activity: Functions and Inverses

This is a graded class activity and is supposed to be completed in 15 minutes.

Consider the following equations:

• $f\left(x\right)=x^2$
• $f\left(x\right)=x-23$

Answer the following questions:

a) Which one is a function?

b) Which function is on-to?

c) Which function is one-to-one?

d) Which function has an inverse? 

e) For the invertible function(s), determine the inverse.