The slope of the line between two points is known as the rate of change in the relation.
a relation with a constant rate of change is linear, while a relation with different rates of change between points is nonlinear (quadratic, cubic,
the rate of change in the relation shown below is
enter your answer in one of two ways:
• as a reduced ratio, like this: 2/3
• as the phrase not constant, like this: not constant