Onto and One-to-One

Today we looked at onto functions and one-to-one functions. Although these two definitions can be confusing, the reference pictures on page 139 should prove to be helpful. Remember that a function is onto if every y is used, and a function is one-to-one if each y only has one arrow pointing at it. We also briefly discussed ceiling and floor functions.

Have a great week!

Coming up:
- Homework: pg. 146 #'s 8-11, 32
- Remember to make up your quiz by Wed. if you have not already
- We will have a big test next Friday (October 5th)

Posting for Points Question:
Is this function onto or one-to-one: (a, 1); (b, 2); (c, 1) Domain: {a, b, c} Range: {1, 2}