change in y/ change in x,
rise over run
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The "steepness" of a line is called the slope. The slope represents the the amount of change in the y-direction of the line per every change in the x-direction. This is represented mathematically by slope = Δy/Δx Δy is also called the "rise" and Δx is also called the "run". The steepness can also be called the gradient, which is represented by an angle. The gradient can be calculated from the slope by using the formula gradient = tan(slope).
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if you know the slope of two epuations, (if the equations are in slope intercept form (y=mx+b, y is the dependent variable, x is the independent variable, m is the slope, and b is the y-intercept) the line represented by the line with the larger slope (|m|) has the steeper slope. If the lines have the same m, the slopes are either equal or negative. If the slope of either line is undefined, it is steeper than any slope other than one that is undefined, in wich the slopes are equal
That of course will depend entirely on the straight line equation which has not been given but in general in the equation y = mx+b the slope is m and b is the y intercept