Question

HELP!!!!!!

Answer 1

However many X's are on the speed, that's how many cars had that speed. For example on the chart, 29 has one X above it; therefore, there was one car that had the speed 29 mph. :)

Answer 2

31 had 0
32 had 0
33 had 2
34 had 4
35 had 5 
36 had 3
37 had 0
38 had 2
39 had 2
40 had 1