You divide the rise, or how much the lines goes up, by the run which is how much it goes horizontally.
how calculate slope mh to mh
Calculate slope as slope=(y2-y1)/(t2-t1).
slope = rise divided by run
the formula used to calculate a slope is: m=y2-y1/x2-x1
2 ordered pairs are needed to calculate slope.
You cannot: the slope is not defined.
slope=rise/run in other words: slope= y-axis/x-axis
You need two points before you can calculate the slope.
Points: (-3, -1) and (3, -2) Slope: -1/6
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Parallel lines have the same slope. So if you know the slope of a line in question, or you can calculate it, then you know the slope of any line parallel to that line.
I am not sure what you mean; I guess some symbols disappeared when posting the question. I assume you have two given points. The idea is to calculate the slope as: slope = (difference in y-coordinates) / (difference in x-coordinates)