1. Sarah purchased her first car and her goal is to pay it off as soon as possible. Some months she pays
more than the minimum payment due. The table below shows the year and her account balance at the start of
each year.
Years
0
1
2
3
3
4
5
5
Account Balance
$25000 $21200 $16200 $11050 $7355 $4375
a. Use your calculator to find the linear regression equation and the correlation coefficient.
Equation (LinReg)
Correlation coefficient (0)
b. Use your calculator to find the exponential regression equation and the correlation coefficient
Equation (ExpReg)
Correlation Coefficient (1)
Which model do you think is more accurate? Explain.
