The accompanying table is a sample set of seasonal farm employment data (t1. yi) over about a

Question:

The accompanying table is a sample set of seasonal farm employment data (t1. yi) over about a two-year period, where t, represents months and y, represents millions of people. A plot of the data is given in the figure. It is decided to develop a least squares mathematical model of the form
y(t) = x1 + x2t + x3 cost.
Determine the least squares model. Plot the resulting function y(t) and the data set on the same coordinate system.