The slope of a vertical line is infinity and the slope of a horizontal line is 0.

If a vertical line passes through the point (7, -8) its equation is x = 7. The equation of a horizontal line passing through the point (7, -8) is y = -8.

** The...**

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The slope of a vertical line is infinity and the slope of a horizontal line is 0.

If a vertical line passes through the point (7, -8) its equation is x = 7. The equation of a horizontal line passing through the point (7, -8) is y = -8.

**The equation of a vertical line through the point (7, -8) is x = 7 and the equation of a horizontal line through the same point is y = -8**