Regents High School Examination Mathematics Worksheet - University Of The State Of New York Page 17

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31 Water is draining from a tank maintained by the Yorkville Fire
Department. Students measured the depth of the water in 15-second
intervals and recorded the results in the accompanying table.
Depth of Water ( y )
Time ( x )
(in feet)
(in seconds)
15
11.8
30
9.9
45
8.2
60
6.3
75
5.9
Write the power regression equation for this set of data, rounding all
values to the nearest ten thousandth.
Using this equation, predict the depth of the water at 2 minutes, to the
nearest tenth of a foot.
[17]
[OVER]
Math. B – Jan. ’08

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