Question

I tried solving it but I everytime I follow how its suppose to go, I dont get the right answer.

Use the exponential regression equation that best fits the data (10,4) (12,20) (13,35) and (16,300) to estimate the value of y when x = 14.

A.
48.4

B.
64.9

C.
132.3

D.
223.7

Answer 1

B. 64.9

Explanation:

A graphing calculator or spreadsheet can fit these points with an exponential curve. An appropriate answer for x=14 is about 73.3.

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Comment on the answer choices

The closest answer that makes any sense is 64.9. Often these problems are worked by someone who uses inappropriate rounding of intermediate results. I haven't found the magic set of numbers to get 64.9. About the lowest I can get is 66.7, using 0.0037·e^(0.7x).