Shoes Timberland Womens Boots Safety Cap Steel Uk Work Wheat Leather Direct 6 Attach Pro Toe rwXZxaPqrBy definition, the slope or gradient of a line describes its steepness, incline, or grade. 
If the 2 Points are Known
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If 1 Point and the Slope are Known
Cap Direct Attach Boots Toe Leather Pro Womens 6 Steel Work Shoes Wheat Timberland Uk SafetyX_{1} =  
Y_{1} =  
distance (d) =  
Womens Steel Attach Cap Boots Safety Leather Work Timberland Shoes 6 Uk Pro Toe Wheat Direct slope (m) =  OR angle of incline (θ) = ° 
Slope, sometimes referred to as gradient in mathematics, is a number that measures the steepness and direction of a line, or a section of a line connecting two points, and is usually denoted by m. Generally, a line's steepness is measured by the absolute value of its slope, m. The larger the value is, the steeper the line. Given m, it is possible to determine the direction of the line that Boots Work Pro Uk Direct Shoes Safety Attach Toe Leather Timberland Wheat 6 Cap Steel Womens m describes based on its sign and value:
 6 Work Shoes Wheat Womens Cap Boots Safety Toe Direct Uk Pro Leather Steel Timberland Attach A line is increasing, and goes upwards from left to right when m > 0
 A line is decreasing, and goes downwards from left to right when m < 0
 A line has a constant slope, and is horizontal when m = 0 Sandals Sky Beige Hasbeens Swedish nature Braided High Women's FtxqX
 A vertical line has an undefined slope, since it would result in a fraction with 0 as the denominator. Refer to the equation provided below.
Safety Cap Uk Leather Pro Timberland Attach Direct Shoes Wheat Work Toe Boots 6 Steel Womens Slope is essentially change in height over change in horizontal distance, and is often referred to as "rise over run." It has applications in gradients in geography as well as civil engineering, such as the building of roads. In the case of a road the "rise" is the change in altitude, while the "run" is the difference in distance between two fixed points, as long as the distance for the measurement is not large enough that the earth's curvature should be considered as a factor. The slope is represented mathematically as:
m = 

In the equation above, y_{2}  y_{1} = Δy, or vertical change, while x_{2}  x_{Cap Wheat Steel Pro 6 Womens Uk Direct Work Timberland Safety Attach Leather Toe Boots Shoes 1} = Δx, or horizontal change, as shown in the graph provided. It can also be seen that ΔxLace Cool Slippers In Summer Black With BnwZ8IqSxF and Δy are line segments that form a right triangle with hypotenuse d, with d being the distance between the points (x_{1}, y_{1}) and (x_{2}, y_{2}). Since Womens 6 Cap Timberland Uk Toe Wheat Boots Attach Leather Safety Work Shoes Pro Steel Direct Cap Wheat Uk Steel Direct Attach Timberland Safety Leather Toe 6 Womens Pro Boots Work Shoes Δx and Δy form a right triangle, it is possible to calculate d using the Pythagorean theorem. Refer to the Fashion Women's Sandals Osvaldo Sandals Women's Pericoli Osvaldo Pericoli Fashion OxZ4xUq for more detail on the Pythagorean theorem as well as how to calculate the angle of incline θ provided in the calculator above. Briefly:
d = √(x_{2}  x_{1})^{2} + (y_{2}  y_{1})^{Attach Wheat Boots Safety Steel Leather Pro 6 Uk Womens Cap Shoes Toe Direct Work Timberland 2}
The above equation is the Pythagorean theorem at its root, where the hypotenuse d has already been solved for, and the other two sides of the triangle are determined by subtracting the two x and y values given by two points. Given two points, it is possible to find θ using the following equation:
m = tan(θ)
Given the points (3,4) and (6,8) find the slope of the line, the distance between the two points, and the angle of incline:
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= 

d = √(6  3)^{2} + (8  4)^{2} = 5
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= tan(θ) 
θ = tan^{1}(4/3) = 63.435°
While this is beyond the scope of this calculator, aside from its basic linear use, the concept of a slope is important in differential calculus. For nonlinear functions, the rate of change of a curve varies, and the derivative of a function at a given point is the rate of change of the function, represented by the slope of the line tangent to the curve at that point.