Annual high temperatures in a certain location have been tracked for several years. Let X represent the year and Y the high temperature. Based on the data shown below, calculate the regression line (each value to two decimal places). y = x + x y 3 28.6 4 26.12 5 26.24 6 26.86 7 24.78 8 24.9 9 24.02 10 23.64 11 20.76 12 20.48 13 18.2 14 16.72 15 16.44 16 16.36 17 13.68 18 15.7

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Chapter6: Exponential And Logarithmic Functions
Section6.8: Fitting Exponential Models To Data
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Annual high temperatures in a certain location have been tracked for several years. Let X represent the year and Y the high temperature. Based on the data shown below, calculate the regression line (each value to two decimal places).

y = x +

x y
3 28.6
4 26.12
5 26.24
6 26.86
7 24.78
8 24.9
9 24.02
10 23.64
11 20.76
12 20.48
13 18.2
14 16.72
15 16.44
16 16.36
17 13.68
18 15.7
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