Q 6

When you are interested in the relation between the class size and course evaluation, identify the explanatory variable.

Q 7

Suppose the regression line for a scatterplot passes through the points (0, 10) and
(5, 20). What type of association exists between the variables?

Q 8

Suppose the regression line for a scatterplot passes through the points (0, 30) and
(5, 20). What type of association exists between the variables?