You may watch this short video in class that explained the idea of a function being one-to-one.
https://www.youtube.com/watch?v=9b8Xd77f-qk
We also found that the graphs of the original function and its inverse are reflections over the line y = x. Their ordered pairs are also switched.
The links below provides a good recap/review
https://www.youtube.com/watch?v=nSmFzOpxhbY
https://www.youtube.com/watch?v=JPPitlVKjWQ
HW: Complete book 6.8 if you have not yet done so and complete page 410 10 - 24 evens tonight.