School Improvement in Maryland
Algebra and Data Analysis - Instructional Strategies
FORMULA REFERENCE SHEET

Equations of a Line

Standard Form:

Ax + By = C

where A and B are not both zero


Slope-Intercept Form:

y = mx + b or y = b + mx

where m = slope and b = y-intercept


Point-Slope Formula:

yy1 = m(xx1)

where m = slope, (x1,y1) = point on line
 

Slope Formula

Let (x1,y1) and (x2,y2) be two points in the plane.

equation
 

Revised September 2006

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Instructional Strategies