Lofton-Haynes

__ Graphing Systems of Equation __
 * Two or more linear equations together form a system of linear equations. A way to save a system of linear equations is by graphing each equation. Look for any point common to each line. Any oredered pair in a system that makes all the equations true is a solution of the system of linear equations.

System of linear equation - two or more linear equations.

Solution of the system of linear equations - any ordered pair in a system that makes all equations true.**


 * No solution - when the graph of the equation are parallel lines.**


 * Infinitely many solutions - when the graphs of the equations are the same line.**

** Solve by graphing ** graph both equations on the same coordinate plane. y=2x-3 the slope is 2. The y-intercept is -3. y=x-1 the slope is 1. The y-intercept is -1. find the point of intersection  The lines intersect at (2,1) so (2,1) is the solution!

See if (2,1) makes both equations true. y=2x-3 y=x-1 1=2(2)-3 1=2-1 1=4-3 1=1 1=1
 * Check: **