The force of the air's resistance to a certain car (in Newtons) as a function
of the car's speed (in km/h) is graphed.
What is the approximate average rate at which the air's resistance
increases, as the car accelerates from 50 km/h to 65 km/h?
600-
Resistance (N)
500-
400+
300-
200-
100-
10
10
20
20
30
40
10
Speed (km/h)
bloms
0
50 60
70
70
13