**Constant Rate of Change**

The meaning of the constant rate of change of a function can be seen when the variables $X$ change in fixed proportions and the $Y$ do as well.

For example, if the constant interval of the $X$ is $2$ and also that of the $Y$ is stable and does not vary from time to time.

The interval of the $Y$ variables does not necessarily have to be equal to that of the $X$ for it to be considered a case of constant rate of change.

If the function is represented with a straight graph, it means that the rate of change is constant.

The rate of change is the slope of the function.

**A constant rate of change is represented by a straight line, as seen in the following scheme:**