Answer:
Step-by-step explanation:
The rate of change, slope, m is
m=(y2-y1)/(x2-x1), we have points (4,5) and (21,39) so
m=(39-5)/(21-4)
m=34/17
m=2
So the rate of change is 2
three and seventy-five hundredths or three point seven five
-2,9
Dont want to explain too long
rorry rorry don't know sir