Mathematics B Regents High School Examination Worksheet- University Of The State Of New York, 2007 Page 8

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Part II
Answer all questions in this part. Each correct answer will receive 2 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. [
]
12
21 A population of wolves in a county is represented by the equation
t
P(t) = 80(0.98)
, where t is the number of years since 1998. Predict the
number of wolves in the population in the year 2008.
22 The accompanying table shows the enrollment of a preschool from
1980 through 2000. Write a linear regression equation to model the
data in the table.
Year ( x )
Enrollment ( y )
1980
14
1985
20
1990
22
1995
28
2000
37
[8]
Math. B – June ’07

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