Using a regression calculator, what is a good line of best fit for the data? A good line of best fit is y almost-equals 0.29 x minus 16.14. because this is what the regression calculator returns if all the data are entered. A good line of best fit is y almost-equals 0.29 x minus 16.14. because this is what the regression calculator returns if all the data except the point (86, 2) are entered. A good line of best fit is y almost-equals 0.36 x minus 20.15 because this is what the regression calculator returns if all the data are entered. A good line of best fit is y almost-equals 0.36 x minus 20.15 because this is what the regression calculator returns if all the data except the point (86, 2) are entered.