Question

each year, the campers at kellys summer camp try to set that summers record for finishing the obstacle course as quickly as possible. record obstacle course completion times according to the table, when was the rate of decrease greater? between 2015 and 2018 between 2014 and 2017

Explanation:

Step1: Calculate the rate of decrease between 2014 and 2017

The time in 2014 is 29 minutes and in 2017 is 27 minutes. The change in time is \(29 - 27= 2\) minutes over \(2017 - 2014 = 3\) years. The rate of decrease is \(\frac{2}{3}\approx0.67\) minutes per year.

Step2: Calculate the rate of decrease between 2015 and 2018

The time in 2015 is 27 minutes and in 2018 is 23 minutes. The change in time is \(27 - 23 = 4\) minutes over \(2018 - 2015=3\) years. The rate of decrease is \(\frac{4}{3}\approx1.33\) minutes per year.

Answer:

between 2015 and 2018