Question

Use the image to answer the question.

A piecewise linear function consisting of five parts is plotted in quadrant 1 of a coordinate plane.
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On Friday, Kaitlyn went to the park to work out. She started with a slow jog at a constant rate for 5 minutes. She then increased her speed to a faster, constant pace for 7 minutes. She took a 3-minute break, then ran for another 7.5 minutes at a constant pace to finish her 2-mile run. She rested for the remainder of the time. What domain interval shows that Kaitlyn took a rest 1.25 miles away from her starting point?

(1 point)
Responses

22.5≤s≤25
22.5 less-than-or-equal-to s less-than-or-equal-to 25

12≤s≤15
12 less-than-or-equal-to s less-than-or-equal-to 15

5≤s<12
5 less-than-or-equal-to s less than 12

15≤s≤22.5
15 less-than-or-equal-to s less-than-or-equal-to 22.5

Answer 1

Kaitlyn's 3-minute break is from 12 to 15 minutes, during which the graph is horizontal at 1.25 miles. So the domain interval is 12 ≤ s ≤ 15.