How do you find the slope of (4, 6), (4, 8) ?

1 Answer
Alan P.
Feb 19, 2017

The line through (4,6) and (4,8) has an "undefined" slope.

Explanation:

This is a vertical line; there is no change in the x coordinate value;
and since the slope is defined to be ("change in "y)/("corresponding change in "x) any attempt to evaluate the slope would result in an attempt ot divide by zero.

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