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a student sayd that the slope of the line for the equation y=20-15x is 20 and the y intercept is 15. find and correct the error

Answer :

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The slope is whatever is next to the x (we know this because of the equation y = mx+b)

So, the slope is -15, not twenty, and the y - intercept is 20. 

You can rewrite the equation as y = -15x + 20

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