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The slope of a line passing through the points (-1, 5) and (3, 5) is?

A) no slope
B) 0
C) 5/4

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Vivian L. | Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACHMicrosoft Word/Excel/Outlook, essay comp...
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Hi Lindsey;
(-1, 5) and (3, 5)
Slope is the change-of-y divided by change-of-x...
m=(y-y1)/(x-x1)
Either point can be denoted as 1.
m=(5-5)/(-1-3)
m=0/-4
The change of y is zero.  It is a straight, horizontal line.
Answer B
If the change of x is zero, it would be a straight, vertical line with an undefined slope because zero cannot be a denominator/divisor.