Determine whether a linear, quadratic, or exponential function best models the data. Then, use regression to find the function that models the data. x

iohanetc 2021-06-22 Answered

Determine whether a linear, quadratic, or exponential function best models the data. Then, use regression to find the function that models the data. 

x01234y10089.578.968.457.8

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Expert Answer

escumantsu
Answered 2021-06-23 Author has 98 answers

a) Check the 1st differences of the consecutive y-values. Since they are nearly constant, we can use a linear model.
y1st differences10089.589.5100=10.578.978.989.5=10.668.468.478.9=10.557.857.868.4=10.6
b)At the WolframAlpha web site you can enter: fit linear {{0,100},{1,89.5},{2,78.9},{3,68.4},{4,57.8}}
Which results i y=100.0210.55x

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