Answer :
Y = total time
X = number of miles after the first part of the race
when X=0 (just after first part, Y = 22 minutes
Then he takes 5.5 minutes to cover each mile. So total time becomes
Y = 22 + 5.5X
where X is in miles and Y is in minutes.
X = number of miles after the first part of the race
when X=0 (just after first part, Y = 22 minutes
Then he takes 5.5 minutes to cover each mile. So total time becomes
Y = 22 + 5.5X
where X is in miles and Y is in minutes.