Regents High School Examination - Mathematics B Worksheet - The University Of The State Of New York, 2009 Page 10
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24Part III
Answer all questions in this part. Each correct answer will receive 4 credits. Clearly indicate the
necessary steps, including appropriate formula substitutions, diagrams, graphs, charts, etc. For all
questions in this part, a correct numerical answer with no work shown will receive only 1 credit.
[
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24
27 Kathy swims laps at the local fitness club. As she times her laps, she
finds that each succeeding lap takes a little longer as she gets tired. If
the first lap takes her 33 seconds, the second lap takes 38 seconds, the
third takes 42 seconds, the fifth takes 50 seconds, and the seventh lap
takes 54 seconds, state the power regression equation for this set of
data, rounding all coefficients to the nearest hundredth.
Using your written regression equation, estimate the number of seconds
that it would take Kathy to complete her tenth lap, to the nearest tenth
of a second.
[10]
Math. B – Aug. ’09
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