In a linear (first-order) equation, it is the ratio of the change in y of a segment to the change in x of the same segment.
If the equation is in the form y = mx + b, m is the slope.
In a higher-order equation, the instantaneous slope is the slope of the tangent line intersecting a particular point along the curve.
If you mean: y = 3.8x then the slope is 3.8 with no y intercept
If you mean y = 11x then the slope is 11
If you mean a slope of -5 and a point of (6, 3) then the equation is y = -5x+33
If you mean a slope of -2 passing through (5, 0) then the equation is y = -2x+10
If you mean a slope of 23 and a point of (0, 4) then the equation is y = 23x+4
If you mean: y = 3.8x then the slope is 3.8 with no y intercept
If you mean y = 12x then the slope of the line is 12
If you mean y = 12x then the slope of the line is 12
If you mean y = 11x then the slope is 11
If you mean a slope of 3 and a point of (3, 9) then the equation is y = 3x-3
If you mean a slope of -5 and a point of (6, 3) then the equation is y = -5x+33
If you mean slope of -10 and point of (1, 4) then the equation is y = -10x+14
If you mean: slope of -13 and point of (5, 7) then the equation is y = -13x+72
If you mean a slope of -10 through the point (1, 4) then the equation is y = -10x+14
If you mean a slope of -12 through the point (5, 3) the equation is y = -12x+63
If you mean a slope of -2 passing through (5, 0) then the equation is y = -2x+10
If you mean a slope of 23 and a point of (0, 4) then the equation is y = 23x+4