1. Given m and (x, y) Substitute point for x and y; substitute m for slope; solve for b.
Given (x1, y1) and (x2, y2) Find slope; substitute one point for x and y; substitute slope for m; solve for b.
Given m and (x, y) Substitute point for x1 and y1; substitute m for slope.
Given (x1, y1) and (x2, y2) Find slope; substitute one point for x1 and y1; substitute slope for m.
Parallel lines have equal slopes.
Perpendicular lines have slopes that are opposite reciprocals of each other.
StandardSlope-Intercept Isolate y.
Point-SlopeStandard Distribute; rearrange.

2. EQUATIONS LINEAR Horizontal Line Slope Vertical Slope-Intercept Line
Form
LINEAR
EQUATIONS
Point-Slope Form
Parallel
Lines
Perpendicular
Lines
Standard (General) Form