Question

The table shows the number of absences, x, in a school year and the final exam scores, y, of several students. Use technology to find the line of best fit. Then interpret the slope and y-intercept of the line of best fit.

Answer 1

Plot the points on the graphing calculator. Then generate a linear regression equation.

a) The line of best fit is

y = -1.707x + 93.524

b) Using the line of best fit, a student with no absences is expected to earn a 94 on the final exam, and the score decreases by about 1.7 points per absence.