Direct Variation Models (HSC SSCE Mathematics Advanced): Quizzes

The other increases proportionally

$k \neq 0$

They pass through the origin $(0, 0)$

$y = kx$

$n = 2$

Cubic variation ($n = 3$)

$k = 50$

$n > 0$

$C = 350$

Linear variation ($n = 1$)