Annual limousine production for the selected years is given in the table below.

(A)

Let x represent time(in years) since1980, and let y

represent the corresponding production of limousines. Enter the data in a graphing calculator and find a cubic regression equation for the data.

(B)

LetL(x) denote the regression equation found in

part(A) with coefficients rounded to the nearest hundredth. Find L(15) and L(15).

(C)

Interpret L(16) and L(16) in this context.

Year

Limousines

Produced

1980 2500

1985 6700

1990 4600

1995 3100

2000 5500