Add an Explanation for The Slope of a Line

[Kyle-Pu]

Issue Templates

Please add a SlopeOfALineExplanation.md file discussing the concept of the slope of a line as well as the equation, how to use it, etc. Be sure to include undefined slopes, 0 slopes, etc in your explanations.

An example of a well-done explanation file can be found at https://github.com/Kyle-P/Mathematics/blob/master/Geometry/HeronExplanation.md.

Thanks!

[manimanasamylavarapu]

There is already one explanation file for this which you have added. So what more is expected

[Kyle-Pu]

Thanks for pointing this out @manimanasamylavarapu. I'll close this issue.