MATH 1020 Calculus Concepts 1.8 Learning Activity 1.8 DMS 4. Year Average Year Average Salary Salary 1980 $15,970 1995 $36,685 1985 $23,500 1996 $37,716 1990 $31,367 1997 $38,562 1994 $35,737 a. Find the best-fitting logarithmic model for the information given in the description. Align the input as years since 1970. Define the model completely. b. Use the logarithmic model to estimate the average salary in 1993. What does the logarithmic model predict for the average salary in 2000? Which of the estimates is an extrapolation and which is an interpolation? Year Salary Type of Estimate 1993 2000 In which of the estimates can you be more confident? c. According to your model, when will the average salary reach $40,000