Question 84745
The easiest way to graph this equation is to select values of x, calculate the corresponding
values of y, plot the resulting (x,y) points, and draw a line through the points.
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For example, when x = 0 then substitute 0 for x in the given equation and you find that y becomes:
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y = 3x + 2 = 3*0 + 2 = 2
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This tells you that the point (0, 2) is on the graph.  Plot this point on the graph.
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Next select another value for x. Suppose you choose x = 5. Substituting 5 for x in the equation
results in:
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y = 3*5 + 2 = 15 + 2 = 17
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This tells you that the point (5,17) is on the graph. Plot it on your coordinate system.
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Just to be on the safe side, let's do a third point so we can find if all three points
are in a straight line.  Suppose we select -3 for x.  Substitute -3 for x in the equation
and you get:
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 y = 3*(-3) + 2 = -9 + 2 = -7
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This tells you that the (x,y) point (-3, -7) is on the line.  Plot it and draw a straight
line through the three points.  This will show you the graph of the equation:
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y = 3x + 2
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When you get done the graph should look like this:
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{{{graph(300,300, -20,20,-20,20,3x+2)}}}
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Hope this helps you understand a way you can graph linear [straight line] equations.