I think I know the answer but I want to be 100% sure so please help

Answer:
3 ft/sec
Step-by-step explanation:
Two clear points to look at are (0,0) and (4,12)
Rate of Change is (12-0)/(4-0)=12/4=3
Answer:
3 feet per second
Step-by-step explanation:
it was 8 seconds and 24 feet at one and 8 times 3 would be 24