Answer:
the letter a because its a straight line so its constanly going at the same rate
<span>We can find as follows
x D=x^2/9
speed braking distance
mph in feet
20 44.44
60 400.00
b) x^2/9=16
x^2=144
x=12 mph</span>
144 = 1 x 144, 2 x 72, 3 x 48, 4 x 36, 6 x 24, 8 x 18, 9 x 16, 12 x 12. Factors of 144: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144.