8 students were asked, how many hours they were studying before
the test, and what grade they got.
a) Find the equation of the regression line for the data below.
Write your answer in form of y=ax+b, do not use the space bar,
round the coefficients to the nearest tenth place.
b) Find the correlation coefficient, round the coefficient to
the nearest hundredth place.
X, hours studying
Y, test grade
12
85
4
60
3
45
14
92
2
54
9
80
8
72
11
65