What is the "rate of change" of a function?
Rate of change is a number that tells you how a quantity changes in relation to another.
Velocity is one of such things. It tells you how distance changes with time.
For example: 23 km/h tells you that you move of 23 km each hour.
Another example is the rate of change in a linear function.
Consider the linear function:
the number 4 in front of
If you get a negative number it means that the
If the number is zero it means that you do not have change, i.e you have a constant!