PMCC & Non-linear Regression (Edexcel A-Level Mathematics): Quizzes

$-1$ to $1$

Perfect positive linear correlation

Perfect negative linear correlation

No linear correlation

$y$ also increases

$y$ decreases

$|r|$ closer to $1$

Moderate positive linear relationship

When relationship isn't linear

$y = ax^2 + bx + c$

$y = ab^x$

$7$ hours