Using the Least Squares Regression Line to Model a Relationship Between Variables (VCE SSCE General Mathematics): Flashcards

Best-fitting straight line through data for predictions

$y = a + bx$

$y$ (what we're trying to predict)

$x$ (what we use to make predictions)

Average change in $y$ per one-unit increase in $x$

Average value of $y$ when $x = 0$

Predicting within data range (reliable)

Predicting outside data range (unreliable)

Proportion of variation in $y$ explained by $x$

Actual value - predicted value