How do you find the slope for x=8?

1 Answer
Alan P.
Apr 7, 2016

The slope of #x=8# is "undefined"

Explanation:

#x=8# is the equation of a vertical line.

Slope is defined as #("change in " y)/("corresponding change in "x)#

But the value of #x# doesn't change i.e., the change in #x# is always #0#;
so the definition of slope would require division by #0# (which is not defined).

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