Displaying and Interpreting Data (HSC SSCE Mathematics Advanced): Quizzes

Linear correlation

$r$ has no units; it is a pure number

When both lie on same side of means

Clustering of points & gradient sign

$(\bar{x}, \bar{y})$

Sum of squares of vertical distances

They are identical

Moderate positive correlation

$b = \bar{y} - m\bar{x}$

Weak negative correlation