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Unformatted text preview: Mat120 Chapter 9 - Section 6 Page 13
Solving Linear Equations and inequalities
mm —- Where the graph crosses the x-axis — this means 3! = 0 In Exercises 1—4, we the graph to idemm' the
u. x-mtemrpr. 0: star that there is no .t-imercept: Ir. y-imercepr. or state that were is no y- intercept. Ii. 1.: + y=4
xe— 0 0“) Mat120 Chapter 9 - Section 6 Page 14 Graphing Linear Equations, Linear Functions, and Absolute Value Functions Formulas:
Slope ofthe Line: m = y2 ~y1 1‘ 9;.”
X2 ‘xl Rm)
Equations of the Line: m=slope of the line,
(x,y) any general point on the line, (xvyl) is any given point on the line a.
b. Slope Intercept Form: y=mx+b
General Form: Ax+By=C In Exercises 27 -38, graph each equation using the slope and y-intercept. In Exercises 30—46.
9. Put the equation in slope-interceptform by solving for}:
b. [den tifv the slope and the y-t‘ntercepr. c. Use the slope and y—imercept to graph the equation. MLSx+3y=lS 33: #5’4/4-5
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