How to use linear regression on a calculator to find out a linear function to predict sales?

the year would go in L1 because L1 is the column for your x value. You can leave the years as they are or change them to 95 98 101 104 and 107 respectively but that is up to you. You will get a different equation but the prediction and everything will be the same. Then the percent will go into L2 which is your y value. just make sure if you decide to change the years you state that