=+An analysis of spending by a sample of credit card bank cardholders shows that spending by cardholders in January

(Jan) is related to their spending in December (Dec):

0 1000 2000 3000 4000 5000 6000 December 8000 6000 4000 2000 0

January The assumptions and conditions of the linear regression seemed to be satisfied and an analyst was about to predict January spending using the model shown below:

Jan = +612.07 + 0.403 Dec