Elena lives 3 miles away from school and it takes het 15 minutes to arrive.
In the grid, the travel time is represented in the y-acis and the distance from school is represented in the x-axis.
When you graph Elena's traveling time, you have to check for its position in the y-axis, and when you graph Elena's distance from school you have to check for the position in the x-axis. Crosing both lines you'll determine the point that represents the value of both variables bor Elena.
Meaning, the coordinates will be x: distance and y: travel time
Elena: (3, 15)
Thinking logically, if you increase the distance, assuming that the traveling method is the same, the traveling time will also increase.