Quote:
Originally Posted by Neal Stevens
@ Gargamel
While doing the exercises at Khan Academy, finding the slope of a line, there was one example where the text shows
m = y1-y2/x1-x2
Now, that's different from everything else they show, and everything else I can find on the web, where slope is clearly defined as
m = y2-y1/x2-x1
That's the correct definition, right? There's no y1-y2 version is there? Or does it not make a difference?  |
just a heads up about the y2-y1 and x2-x1; they are the co-ordinates of the line you are trying to find the gradient of. Just imagine the line goes through (0,0) and (3,7). The co-ordinates are as such;
y1=0, y2=7, x1=0, x2=3
sub them in accordingly; and you get
m=7-0/3-0
m=7/3
Does that help with it?