Hudson Marine has been an authorized dealer for C&D marine radios for the past seven years. The following table reports the number of radios sold each year.

Year 1234 5 6 7 Number Sold 35 50 75 90 105 110 130

a. Construct a time series plot. Does a linear trend appear to be present?

b. Using Minitab or Excel, develop a linear trend equation for this time series.

c. Use the linear trend equation developed in part

(b) to develop a forecast for annual sales in year 8.