Following is a portion of the computer output for a regression analysis relating y = maintenance expense (dollars per month) to x = usage (hours per week) of a particular brand of computer terminal.

a. Write the estimated regression equation.
b. Use a t test to determine whether monthly maintenance expense is related to usage at the .05 level of significance.
c. Use the estimated regression equation to predict monthly maintenance expense for any terminal that is used 25 hours perweek.

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The regression equation is Y = 6.1092 + .8951 X Predictor Constant Coef 6.1092 0.8951 SE Coef 0.9361 0.1490 Analysis of Variance SOURCE Regression Residual Error Total DF 1575.76 349.14 1924.90 MS 1575.76 43.64