SYSTEMS+OF+2+VARIABLES+GRAPHIC,+ELIMINATION,+CRAMER'S+RULE

Methods for solving a system of linear equations in 2 variables: 1. Graphic 2. Subsitution 3. Elimination 4. Cramer's Rule
 * Grids
 * Graphing Calculator

Lines that intersect in one point are __consistent independent__. Lines that don't intersect are __inconsistent__. Lines that intersect at every point are __consistent dependent__.

Graphic:
 * Solve each equation for y
 * Graph on a grid or using graphing calculator
 * Determine the point of intersection, or if they are parallel, or if the are consistent dependent.
 * [|Graphic method link]

Elimination: 6x + 2y = 9 6x + 3y = 18
 * Eliminate one variable from the 2 equations
 * -y = -9, so y = 9
 * Put 9 into the equation for y and solve for x
 * [|Graphing, Elimination link]

Cramer's Rule:
 * [|Cramer's rule link]