# What is the "rate of change" of a function?

##### 1 Answer

Dec 21, 2014

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!

Examples: