1. Objective 1

2.  Troy borrowed money from his father so that he could buy a used car. The table shows the remaining balance, b, of Troy’s loan after each payment. Number of payments, p Loan Balance, b 1$3910 2$3685 3$3460 4$3235 5$3010 6$2785

3.  SOLUTION:  To complete this problem on the calculator, you need to press the STAT button.

4.  Then press ENTER on EDIT.  You should have the following screen.  If numbers appear below L1, L2, or L3, delete them by pressing the DEL key.

5.  Under L1, type the number of payments.

6.  Under L2, type in the loan balance.

7.  Now press STAT again. With the right arrow key, move to CALC.

8.  When the following screen appears, press ENTER.

9.  Go down to 4 and press ENTER.

10.  The following is your answer.  After substitution, y = -225x + 4135  y is the loan balance, b. And x is the number of payments, p. So the answer should be  b = -225p + 4135

11.  Which mapping best represents the function y = 2x 2 + 1 when the replacement set for x is {-1, 0, 3}? x y 0 3 1 5 37 x y 0 3 1 19 x y 1 3 19 0 3 x y 0 3 1 3 19

12.  First press Y= on the calculator.

13.  Under Y1=, type in the equation.

14.  Type 2 ND TABLE so that the table of values for the function appears.

15.  Look for the values that the question is asking for. The question is asking for -1, 0, and 3. What y values do these x values relate to?  -1 --- 

16.  0 --- 

17.  3 --- 

18.  Now check to see that -1, 0, and 3 point to the correct y values in the mapping. x y 0 3 1 3 19