Question

What is the slope of the line that passes through the pair of points (-2.5,6.1) and (-2.5,3.1)
-3
3
0
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Answer 1

(-2.5,6.1)(-2.5,3.1).....notice how ur x values are the same. This means that u have a vertical line which has an undefined slope.

IF ur y values would have been the same, u would have had a horizontal line which has a 0 slope.