he table below shows the profit, �(�), in dollars, from selling � items.

�

1

2

3

6

9

14

�(�)

78.4

92

95.8

48.4

-87.2

-509.2

Using your calculator to do a quadratic regression, express the profit as a function of the number of items sold. �(�)=   Round all numbers to 1 decimal place.

Using your quadratic regression, estimate the profit from selling 8 items?  Select an answer items dollars  Round to 2 decimal places.

Using your quadratic regression, estimate the number of items that need to be sold to make a profit of $13 ?  Select an answer items dollars