NEED THIS ANSWERED QUICK, 40 POINTS!!!!!!!

Laura is planning to attend a soccer skills camp that will require her to complete different task skills in the fastest time possible. to get ready for the event, she is practicing and logging her time to complete each skills task.

The x-coordinate is the skills task number, and the y coordinates is the time in seconds. (1,4) (2,8) (3,16) (4,32)

What does the average rate of change represent in the context of the question? Use complete sentences.

(The ARC{Average Rate of Change} is 15 I just need the questioned answered)