申論題

8. CWD-Tel operates mobile telephone systems in a developing country. David, a manager at CWD-Tel, wants to predict the peak demand for circuits, on the basis of the number of portable phones in a region. He has obtained the following data for 20 regions:

(Thus, for example, Region 11 had 54,061 portable phones and its peak demand was 6,878 circuits.)
David used linear regression for this purpose. The resulting computer output is shown below:

(a) Write a complete equation for the simple linear regression model that incorporates the estimated coefficients provided by this computer output. Make sure to define in words all the variables used in this equation.
Answer=__(S)__.