(-7,9) and (-7,3) slope of the line

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Guest Oct 28, 2014

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The formula for the slope of a line is m = (y2 - y1) / (x2 - x1).

Letting x1 = -7, y1 = 9, x2 = -7, and y2 = 3: m = (3 - 9) / (-7 - -7) = -6 / 0 <-- undefined.

It's a vertical line, so it has "no slope" or an "undefined slope".

geno3141 Oct 28, 2014

geno3141 · Answer 1 · 2014-10-28T01:49:58

The formula for the slope of a line is m = (y2 - y1) / (x2 - x1).

Letting x1 = -7, y1 = 9, x2 = -7, and y2 = 3: m = (3 - 9) / (-7 - -7) = -6 / 0 <-- undefined.

It's a vertical line, so it has "no slope" or an "undefined slope".