Question

The graph shows the distance, y, in miles, of a moving motorboat from an island for a certain amount of time, x, in hours:

What is the speed of the motorboat?
Group of answer choices
A. 35 miles per hour
B. 70 miles per hour
C. 105 miles per hour
D. 315 miles per hour

Answer 1

Answer:  The speed of the motorboat is 70 miles per hour

Step-by-step explanation:  Subtract the initial distance, 35, from the distance at any given time, then divide the remainder by the hours.

For example, at 2 hours, the distance shown on the graph is 175 miles

Subtract: 175 -35 = 140.  Then divide 140/2 = 70

At 4 hours, the distance shown is 315 miles.

Subtract: 315 - 35 = 280. Then divide  280/4 = 70

70 mph is the speed.