a. It is linear because it has a constant rate of change.
b. It is linear because it does not have a constant rate of change.
c. It is not linear because it has a constant rate of change.
d. It is not linear because it does not have a constant rate of change.
![a It is linear because it has a constant rate of changeb It is linear because it does not have a constant rate of changec It is not linear because it has a cons class=](https://us-static.z-dn.net/files/d20/9c22c12081b3c05754a20b29feb270e2.jpg)