As a start in analyzing these data,

a. Graph these data and indicate whether they appear to have a linear trend.

b. Develop a simple linear regression model with time as the independent variable. Using this regression model, describe the trend and the strength of the linear trend over the 16 years. Is the trend line statistically significant? Plot the trend line against the actual data.

c. Compute the MAD value for this model.

d. Provide the Malcar Autoparts Company an estimate of its expected sales for the next 5 years.

e. Provide the maximum and minimum sales Malcar can expect with 90% confidence for the year 2014.