Two Types of Rate of Change
Average Rate of Change
Questions about this always give an interval
Formula for average rate of change over the interval 𝑎,𝑏: 𝑓𝑏−𝑓𝑎𝑏−𝑎
Instantaneous Rate of Change
You won't have to actually calculate it. Just comment on it and maybe estimate it
We won't usually use the word "instantaneous" to save time, but you can use it to add clarity.
The term "Rate of Change" should be intimately connected to the word "slope" in your head. If your phone always autocorrected "rate of change" to "slope" it will not interfere with your life.