Question

Lori is driving from her home to a conference 320 miles away. The table below provides the total distance traveled at specific times since the trip began. Use the table to estimate the average rate of change in distance (average speed) as t varies from hour 1 to hour 4 of the trip Express the answer as a decimal accurate to two decimal places time since trip began (hours) distance traveled (miles) 0 0 70 125 167 232 302 2 3 4 Your Answer

Answer 1

When t = 1 hours then distance d = 70 miles and when t = 4 hours then d = 232 miles.

Therefore, average rate of change in distance ,i.e., average speed as t varies from hour 1 to hour 4 of the trip is =

(232-70)/(4-1) miles per hour

= 162/3 miles per hour

= 54 miles per hour