2001 CEMC Pascal Problems/Problem 11
Problem
Sahar walks at a constant rate for 
minutes and then rests for minutes. Which of these distance, 
, versus time, 
, graphs best represents his movement during these 
minutes?
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Solution
Using the information given in the problem, we see that the slope must be a non-zero constant number for the first minutes. This eliminates answer choice B because of the slope changing, as well as C and E because the slope is 
.
Answer choice A does not change slope at minutes, and does not show Sahar resting for minutes, meaning that A cannot be the answer.
Since all of the other answer choices have been eliminated, the answer is B.
~anabel.disher
