the graph below plots a function f x if x represents time the average rate of change of the function f x in the first three seconds is

Answer:
-50
Step-by-step explanation:
rate of change = slope so you were asked for the slope between the point in which x = 0 (0,150) and the point in which x=3 (3,0)
Here is how you calculate it:
https://simplisico.com/share/q/ZAHw5oFz9yYoOV0BmMRwQI9U