Question 1041581
Find the slope of the line which goes through points (1.2, 8) and (3.6, 10).  Make sure you simplify the fraction into integers (if necessary) to match the definition of the Standard Form of an equation.
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A line in 3-space has a slope wrt each of the 3 planes.
If it's treated as a vector and translated to pass thru the Origin, the direction cosines are used.
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3-space is a LOT more than 1.5 times as complicated as 2-space.