Marisol took trips from City A to City B.
The distance between City A and City B is miles.
Marisol drove at an average speed of about miles per hour.
It took Marisol hours to drive from City A to City B.
Explanation
Correct answer: C.
Choice C is correct. It's given that is the distance, in miles, Marisol traveled after driving for hours. Therefore, represents the distance in miles traveled per hour, which is the speed she drove in miles per hour.
Desmos solution:
Note: The coefficient 45 in d(t)=45t is the slope, so it represents the distance added per hour that is, miles per hour.
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice A
Choice A is incorrect and may result from misidentifying speed as the number of trips.
Choice B
Choice B is incorrect and may result from misidentifying speed as the total distance.
Choice D
Choice D is incorrect and may result from misidentifying the speed as the time, in hours.