1 Lines, Angle of Inclination, Distance Formula (Theory)

Slope Formula

7 Equations for Lines

(1) point-slope

(2) slope-intercept

(3) constant function

(4) standard form (cover up method)

(5) general form

(6) two-point form

(7) intercept form

Slope-Intercept Form

y = mx + b

Formula for a Horizontal Line

y = c

Formula for a Vertical Line

x = c

Standard Form

Ax + By = C (Cover Up Method)

General Form

Ax + By + C = 0

Two-Point Form

Intercept Form

Slope of Parallel Lines

(1) same slope

Slope of Perpendicular Lines

(1) negative-reciprocals

Angle of Inclination Formula

m = Tan θ

Distance Formula

Domain and Range of Linear Functions

(−∞, ∞)