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Elementary Algebra
A review of concepts and
computational skills
Chapters 3-4
Linear Equations and their Graphs
Graphing points and lines
Coordinate system
Quadrants
x-axis and y-axis
Ordered pairs (x, y)
Graphing linear equations Ax + By = C
using x|y tables (ordered pairs)
Horizontal and Vertical lines
Slope
 Slope- steepness of a line
 Change in y / change in x
 Rise over run
 Find slope from graph
 Find slope given 2 points
 Slope for horizontal and vertical lines
 Graph a line given slope and a point on the line
 Parallel and perpendicular lines
Equations of Lines in Slope-Intercept
Form
Slope-intercept form: y = mx + b
Use to graph a line
Write an equation given slope and yintercept
Point-Slope Form
Point-slope form: y - y1 = m(x – x1)
Write an equation given point and slope
Write an equation given 2 points
Systems of Linear Equations and
Inequalities
Graphing a system of equations
Solving by graphing
Independent, dependent and inconsistent
systems and their graphs
Substitution method
Elimination method
Graphing linear inequalities and systems