Using the relationship a = exp (ln (a)) -- for example, in Audit Class 1, a = e ^6.13 = 459 -- we can determine the equation for Normalized Cumulative ATR for each audit class as a function of the audit coverage. These three equations are: Audit Class 1 Y = 459 X ^0.64 Audit Class 2 Y = 498 X ^0.45 Audit Class 3 Y = 837 X ^0.36 This should get you well on your way to being able to help Al Swanson with his problem. Remember that he is trying to determine a recommended audit coverage (i.e., percent of returns to audit) for each of the three audit classes

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Using the equations you provided we can solve for the recomme... View the full answer