### Home > GB8I > Chapter cc43 > Lesson cc43.1.1 > Problem 3-12

Mr. Saksunn is concerned both about his students’ scores on the last math test, and about the number of students looking tired in class. He decides to see if there is a relationship between the number of tired or sleepy behaviors (yawns, nodding-off, head on desk) a student exhibits and their test score. He has his assistant observe

Tired Behaviors | ||||||||||

Test Score |

Make a scatterplot on graph paper and draw the line of best fit. Determine the equation of the line of best fit.

Place the Tired Behaviors on the

-axis and Test Score on the-axis for your scatterplot.The test score is

. The number of tired behaviors is.Using your equation from part (a), predict the test score of a student who exhibits

tired behaviors during Professor Saksunn’s math class in a week. Substituting

in for results in.