if Marcie runs 35 minutes in 1 week, 50 minutes in 2 weeks and 80 minutes in 3 weeks, if she continues this pattern how many hours will she run in 8 weeks?

Question

Functions 

Answer 1

Week 1 has a starting value of 35.

 

The differences between week 2 and week 1 (15) and week 3 and week 2 (30) determine the pattern for the sequence.

 

    35  50  80  125  185  260  350  455    (note: it could be others)

 

455 minutes is 7 hours 35 minutes

 

 

 

Answer 2

First one increases by 15, second one increases by 30, so the next should increase by 60. So, 140 minutes.