The school record in the 200 -meter dash is 34 point 5 seconds. Which graph represents the set of times, in seconds, that would create a new school record?
Answer
A
Image with description A number line ranges from 32 point 5 to 35 point 5 by one halves. A closed circle is on 34 point 5. A ray is drawn from that circle pointing to the right.
B
Image with description A number line ranges from 32 point 5 to 35 point 5 by one halves. An open circle is on 34 point 5. A ray is drawn from that circle pointing to the left.
C
Image with description A number line ranges from 32 point 5 to 35 point 5 by one halves. A closed circle is on 34 point 5. A ray is drawn from that circle pointing to the left.
D
Image with description A number line ranges from 32 point 5 to 35 point 5 by one halves. An open circle is on 34 point 5. A ray is drawn from that circle pointing to the right.
Explanation
A new 200-meter dash record must be a faster time than 34.5 seconds, so the time must be less than 34.5. Because a time of exactly 34.5 seconds only ties the existing record, it is not included; the graph needs an open circle at 34.5 and a ray to the left. That is choice B.
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