Question

Mr. G rents a truck for 3 hrs at $80 and then rents it again for an additional 5 hrs at $320. What was his rate of change for Mr. G during his second period of rental?

A. $120/hr
B. $240/hr
C. $1/120hr
D. $2/240hr

Answer 1

Rate of change for Mr. G during his second period of rental is :---

`→((\$320 - \$80))/((5hr - 3hr)) = (\$240)/(2hr) = \boxed{\$120{hr}^(-1)} \\`

A. $120/hr is the right answer.

Answer 2

A is the answer! 320 - 80 = 240, divide by 2 = 120/hr!