Objective 1

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 $39102 $36853 $34604 $32355 $30106 $2785

SOLUTION: To complete this problem on the calculator,

you need to press the STAT button.

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.

Under L1, type the number of payments.

Under L2, type in the loan balance.

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

When the following screen appears, press ENTER.

Go down to 4 and press ENTER.

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

Which mapping best represents the function y = 2x2 + 1 when the replacement set for x is {-1, 0, 3}?

x y-1

0

3

1

5

37

x y-1

0

3

3

1

19

x y1

3

19

-1

0

3

x y-1

0

3

1

3

19

First press Y= on the calculator.

Under Y1= , type in the equation.

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

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 ---

0 ---

3 ---

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

x y-1

0

3

1

3

19