Answer:
3/4
Explanation:
The rate of change is referring to the slope, which can be calculated by rise/run. There are two points we can use to find the slope: (0,3) an (4,6), but feel free to use any points on the graph that you want to. Between those two points, the function's y value ("rise") increases by 3, while the function's x-value ("run") increases by 4. Divide 3 (rise) by 4 (run) in order to calculate the rate of change.