Answer:
The 1st runner has the fastest pace
Step-by-step explanation:
For the first runner, m = (y2 - y1) / (x2 - x1) 
= (40 - 0) / (4 - 0) 
= 40/4 
= 10
The second runner's pace is 8.5 
For the third runner, m = (y2 - y1) / (x2 - x1) 
= (90 - 72) / (10 - 8) 
= 18/2 
= 9 
So the first runner has the fastest pace with 10 minutes per mile
Hope this helps, and please mark me brainliest if it does!