Equation of a Line (Grade 11 NSC Matric Mathematics): Quizzes

Two-point form

$\frac{y - y_1}{x - x_1} = \frac{y_2 - y_1}{x_2 - x_1}$

Gradient-point form

$y - y_1 = m(x - x_1)$

The y-intercept

Rise over run

Standard form

Line decreases as $x$ increases

$y = c$

They all represent the same line