Using the data given in the problem:
Month Payment
1 $110.03
2 $45.66
3 $22.87
.
.
.
12
We now set up an equation for the payments, input in your calculator (STAT)
y = mx + b
m = -43.58
b = 146.68
y = -43.58x + 146.68
Therefore, the rest of the values are summed up then this will be your total for one year.
