A mathematics teacher wanted to see the correlation between test scores and homework. The homework
grade (x) and test grade (y) are given in the
accompanying table. Write the linear regression
equation that represents this set of data, rounding all
coefficients to the nearest hundredth. Using this
equation, find the projected test grade, to the nearest
integer, for a student with a homework grade of 49.
Homework Grade (x) Test Grade (y)
89
90
65
53
87
90
55
55
89
89
66
67
80
82