To compare the linear functions, you first need to find their equations. For each of the linear functions, write an equation to represent the puppy's weight in terms of the number of weeks since the person got the puppy.

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.