Hi,

I hope someone can help me with the following question:

And this is the data:

I used the online graphing technology program called, MyCurveFit, and I got the following data for the following functions:

Quadratic: y = 395.3571 - 11.28571*x + 0.1285714*x^2

Exponential(basic): y = 57.99277 + 339.1588*e^(-0.03634446*x)

Linear: y = 3263.235*x - 6380067

These equations that I listed above are pretty far off from what it seems to the textbook's, as follows:

Can anyone tell why my equations are so far off from the textbook's?