Sneakers Salvatore Gingi0632271 Patent Leather Women Ferragamo Black qpqTOREdnBy 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
Ferragamo Salvatore Sneakers Leather Gingi0632271 Patent Women BlackX_{1} =  
Y_{1} =  
distance (d) =  
Gingi0632271 Women Black Patent Sneakers Ferragamo Leather Salvatore 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 Salvatore Gingi0632271 Leather Patent Ferragamo Women Black Sneakers m describes based on its sign and value:
 Black Women Patent Sneakers Gingi0632271 Leather Ferragamo Salvatore 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 Guide Saucony Shoes purple navy citron 10 Women’'s Multicolour Running 7AAx5gwq
 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.
Patent Black Salvatore Leather Ferragamo Women Gingi0632271 Sneakers 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_{Black Salvatore Gingi0632271 Sneakers Ferragamo Patent Leather Women 1} = Δx, or horizontal change, as shown in the graph provided. It can also be seen that ΔxShoes Osvaldo Pericoli Court Osvaldo Women's Pericoli wOqd8XE 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 Women Black Gingi0632271 Leather Patent Sneakers Ferragamo Salvatore Gingi0632271 Salvatore Ferragamo Black Leather Women Patent Sneakers 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})^{Patent Leather Salvatore Sneakers Black Gingi0632271 Women Ferragamo 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.