The number of plumbing repaie jobs performed by Angur's Plumbing Service in each of the last four years is listed below:
Time Period Demand
4 years ago 45
3 years ago 54
2 years ago 59
Last year 65
a.) What is this year's forecast using weighted moving average with weights equal to .6, .3, and .1?
b.) What is this year's forecast using the linear trend (regression) approach?