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All that matters once you have y = -2x is the y-intercept.

Examples:

y = -2x +3

y = -2x - 8

y = -2x + 4

You can change the y-intercept to whatever numbers you want.

One extra hint: All the lines with the slope of -2x will be parallel on a graph, no matter what the y-intercept is.

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Q: What are three equations for y equals -2x?
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