A car travels 2 1/3 miles in 3 1/2 minutes at a constant speed. Write an equation to represent the car travels in miles and minutes

Find the rate at which the car travels.  It is 2 1/3 miles divided by 3 1/2 minutes:

7
--
3
--------- = 2/3 mile per minute.   
7
---
 2

Then y = (distance traveled) = (2/3 mile per minute)x, where x is the number of minutes involved.