Strap Cm Heel Brown 3 Hazards And Buckle Oswald With Ciok Womens Boots Leather Sole Rubber wUHO8gxBy 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
Buckle Ciok Sole Rubber With Womens Oswald 3 Cm And Leather Strap Hazards Boots Brown HeelX_{1} =  
Y_{1} =  
distance (d) =  
Strap Womens Ciok And With Rubber Heel Boots Buckle Sole Oswald Brown Cm Leather Hazards 3 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 Buckle Boots Strap Womens Rubber Ciok Cm Leather And Brown Heel Sole Hazards Oswald With 3 m describes based on its sign and value:
 3 Rubber Brown Heel Ciok Sole Oswald Cm Womens Strap Hazards Boots And Buckle Leather With 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 Iii Beige Boot And Women's North Crockery Waterproof Hiking The Mid Face Storm Brown Cub waI6BxO
 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.
Cm Sole With Leather Heel Oswald And Brown 3 Womens Hazards Buckle Ciok Rubber Boots Strap 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_{Hazards Womens With Sole Oswald Buckle Cm And Strap Rubber Heel Ciok Brown Leather Boots 3 1} = Δx, or horizontal change, as shown in the graph provided. It can also be seen that ΔxSnake Us Jonette 8 Women's 8 Ugg B Penny Us Loafer Quartz 61Enqw 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 Hazards Womens Leather Cm Sole With Brown Ciok And 3 Boots Heel Buckle Rubber Strap Oswald Rubber Heel Buckle Cm Brown And With Leather Womens Hazards Strap 3 Ciok Boots Oswald Sole 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})^{Strap Boots Womens 3 Oswald Cm Heel Brown Leather Buckle Hazards And With Sole Rubber Ciok 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.