Having trouble with this practice problem. Any help would be greatly appreciated! TIA!

The following table shows students test scores on the first two tests in an introductory biology class. Biology Test Scores First 86 91 81 43 48 59 73 40 74 50 75 40 test, x Second 89 75 81 33 47 51 63 37 65 54 66 39 test, y Copy Data Step 1 of 2: Find an equation of the least-squares regression line. Round your answer to three decimal places, if necessary. Answer y = +