The times taken by 25 people to complete a puzzle are shown. Time, t minutes
0 Frequency
6
81
7
10 8
CO
20 7
30 < t < 40
4
Frequency
Draw a frequency polygon
for the data.
2
1
ws
0
0
40
10 20 30
Time, t (minutes)

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.