consider the following time series for anual sales of a company, for four years and find the average rate of change per year in sales . Rs.10,000, Rs.8,000, Rs.12,000 and Rs.15,000

dear student,

first of all we will calculate rate of change for consecutive years and then take their average to find the average rate of change per year,

=>  (-2000 + 4000 + 3000 )/3

=> 5000/3 per year,

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