You have to massage the equation around until it's in a standard form, with 'Y' all alone on one side of the equation, and everything else on the other side. It'll look like this:
Y = (S)x + (B). 'S' and 'B' are just numbers.
If you can get the equation of the line into this form, then the number 'S' is the slope of the line, and the number 'B' is the number on the y-axis where the graph of the line crosses that axis.
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If you mean: y = 3.8x then the slope is 3.8 with no y intercept
If the equation of a line is in the form ax + by + c = 0 then the slope of the line will be -a/b.
If the slope m is given at a point (xo, yo) of a line, then the equation of the line is given by: y - yo = m(x - xo)
An equation of a line requires two parameters. The slope, by itself, is not enough.
Assuming the point is (3, -6) and the slope 1, the equation is x - y - 9 = 0