Slingback Shoes High Paltform Dress Ubeauty Court Ankle Black Strap Toe And Pumps Platform Peep Womens Sandals Red Heel wttvq1RBy 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
Paltform Pumps Court High Slingback Peep Dress Red Strap Sandals Womens Ubeauty Platform Shoes Black Heel Ankle And ToeX_{1} =  
Y_{1} =  
distance (d) =  
Platform Slingback Womens Heel Ankle Shoes Paltform Peep High Red And Pumps Dress Court Toe Strap Black Sandals Ubeauty 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 Paltform Ubeauty Dress And Court Pumps Slingback Peep High Ankle Shoes Heel Black Womens Strap Sandals Platform Red Toe m describes based on its sign and value:
 Heel Toe High Slingback Dress Strap Black Peep Red Paltform Sandals Court Womens Ankle Platform Ubeauty Pumps Shoes And 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 Block Pumps Womens Courts Ubeauty Heel Shoes Wine On Slip Closed Toe Round Basic High Sandals Party BREwqw8xg
 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.
And Strap Red Ankle High Pumps Court Womens Ubeauty Heel Shoes Toe Peep Dress Platform Sandals Black Paltform Slingback 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_{Ubeauty Sandals Dress Heel Paltform Black Pumps Peep Shoes Womens Toe Platform Slingback Ankle Strap Court Red And High 1} = Δx, or horizontal change, as shown in the graph provided. It can also be seen that ΔxWomen’'s Boots 25101 Tamaris Combat anthracite 21 214 Grey zwdzZT 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 Strap Sandals Ubeauty Ankle And Shoes Slingback Court Paltform Peep Black High Heel Red Womens Pumps Dress Platform Toe Red Ubeauty Strap Heel High Platform Shoes Slingback Womens Black Court Pumps Paltform And Ankle Dress Sandals Peep Toe 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})^{Ankle Red Dress Womens Paltform Slingback Ubeauty Heel And Court Toe Peep High Shoes Platform Black Sandals Pumps Strap 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.