Slopes of X and Y Axis

Asked by harshil92 | 21st Feb, 2010, 06:37: PM

Expert Answer:

The formula m1m2 = -1, is used for NONZERO VALUES OF SLOPES TO BE EXACT. However it does satisfy the relation,

Let's pick a infinite line, our x axis with slope ZERO and ask the question what'll be the slope of line perpendicular to this line.

mxmy = -1

my = -1/mx = -1/0 = - ∞ ,and that is y axis. Hence x and y axis are perpendicular to each other as we know.

Regards,

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Answered by  | 21st Feb, 2010, 06:55: PM

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