How do I determine if there is a linear relation among air temperature x1?, wind speed x2?, and wind chill y from the data shown below, measured values for various days, and then determine what the least-squares regression equation y = b0 + b1x1 + b2x2?, where x1 is air temperature and x2 is wind? speed, and y is the response? variable, wind chill?
X1 -30 30 -10 -30 -20 10 30 0 0 -30 -20 30 -10 20
X2 70 30 50 100 30 80 20 10 40 50 40 50 20 90
Y -96 0 -62 -104 -64 -44 6 -22 -44 -88 -70 -8 -44 -32