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25 January, 10:49

What is the equation of a horizontal line?

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  1. 25 January, 11:14
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    Horizontal lines have a slope of 0. Thus in the slope intercept equation, y=mx+b, m=0. The equation becomes y=b where b is the y-coordinate of the y-intercept. Since y always takes the value of - 1, an equation for the line is y = - 1
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