Math Quiz for 9th Graders

Pythagorean theorem

Cosine rule

Sine rule

Heron's formula (correct)

$y = c$

$x = c$

$y = mx + b$ (correct)

$x = my + b$

$y = 3x$

$x = 3y$ (correct)

$x = 4y$

$y = 4x$