Are these the correct answers? I was late to class and might have missed the answers. Answers might save Dana some time!

**Ex. 0.18** The function is

a. one-to-one and not onto. Range = $[0,\infty]$

b. not one-to-one, not onto. Range = $[3, \infty]$

c. not one-to-one, not onto. Range = $[-1,1]$

d. not one-to-one, not onto. Range = $[0,\infty]$

**Ex 0.20a**

One possible answer is $f(x) = x + 1$.

Cathy Fulkerson Ajamie