1. num of minutes 2,
 distance traveled 200 yds 
average rate of speed 100 yds/min
2. num of minutes 2 
distance traveled 400 yd
 average rate of speed 200 yd/min
3. num of minutes 4
 distance traveled 600
average rate of speed 150 yd/min
4 he ran faster in the last two minutes 
5. yes because it passes the vertial line test. it is linear