use excel for data a graph and word to answer question

Problem 2-28A Estimating fixed and variable cost using the regression method
a)
By using the scatter plot, using Excel, we have
So, it can clearly be written on the basis of above scatter plot that for describing the how total office support costs can be estimated:
b)
By using Excel, the regression summary output is given below:
    SUMMARY OUTPUT
    
    
    
    
    
    
    
    
    
    
    
    
    
    Regression Statistics
    
    
    
    
    
    Multiple R
    0.91155
    
    
    
    
    
    R Square
    0.830923
    
    
    
    
    
    Adjusted R Square
    0.825093
    
    
    
    
    
    Standard...