2.2,2.3 Graphing Linear Equations & Intercepts

2.2,2.3 Graphing Linear Equations & Intercepts -...

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2.2: Graphing Lines in the Coordinate Plane The solution set for an equation in two variables consists of all order pairs (x, y) that satisfy the  equation.  For a linear equation such as y = 3x + 8, there is an infinite number of ordered pairs that   satisfy the equation.  Rather than writing all of them, a graph shows them as a line extending infinitely  in both directions.   All solutions fall on that line.    Complete the given ordered pairs so that each   ordered pair satisfies the given equation: 1. y =  1 2 2 x +   (-1,  ) ( , 4)   We can graph linear equations by choosing a value for one variable and calculating the value of the  other.  At least two points are required to define a line but 3 points are recommended.  Make a table  of values. 2.    y = x – 1 3. 3 = 2x – y x x - 1 y x 2x - 3 y -4 -3 -2 -1 1 2 3 4 -4 -3 -2 -1 1 2 3 4 x y   
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2.2,2.3 Graphing Linear Equations & Intercepts -...

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