How do you graph the straight line equation, y=9-2x?

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Graph the line y=9-2x:

Since you know that the graph is a straight line you need only find two points that satisfy the equation and connect them with a line. From geometry you know that two points determine a line.(i.e. through two points there is one and only one line.)

But a slightly more efficient way is to write the equation in a...

(The entire section contains 187 words.)

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