# Use trend equation to calculate points, graph, regression line

The sales, in billions of dollars, of Keller Overhead Door, Inc. for 1995 to 2000 are:

Year Sales Year Sales

1996 7.45 1998 7.94

1996 7.83 1999 7.76

1997 8.07 2000 7.90

Use the trend equation to calculate the points for 1997 and 1999. Plot them on the graph and draw the regression line.

Estimate the net sales for 2003.

By how much have sales increased (or decreased) per year on the average during the period?

How do one go about estimating the net sales for this?

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#### Solution Preview

The sales, in billions of dollars, of Keller Overhead Door, Inc. for 1995 to 2000 are:

Year Sales Year Sales

1996 7.45 1998 7.94

1996 7.83 1999 7.76

1997 8.07 2000 7.90

Use the trend equation to calculate the points for 1997 and 1999. Plot them on the graph ...

#### Solution Summary

The expert uses the trend equation to calculates the point, graphs and regression lines.