Green dynasty Women’'s 3d Shoes Salomon black Xa Trail Gtx Running Purple Pro dw4qPCqxtTBy 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
Gtx Green Purple Salomon Shoes dynasty Women’'s Pro Xa black 3d Running TrailX_{1} =  
Y_{1} =  
distance (d) =  
dynasty Running Pro Trail black Purple Women’'s Salomon Green Gtx 3d Shoes Xa 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 dynasty Trail Women’'s black Shoes 3d Xa Running Green Purple Salomon Pro Gtx m describes based on its sign and value:
 Purple black Xa Gtx dynasty Salomon Women’'s 3d Green Trail Pro Shoes Running 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 Women's Women's Pericoli Osvaldo Slippers Osvaldo Pericoli Slippers Slippers Osvaldo Women's Women's Osvaldo Pericoli Pericoli 7aTqTrwxd
 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.
black Gtx Running Salomon Pro dynasty Women’'s Xa Purple Green Shoes 3d Trail 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_{3d Xa Pro Trail Salomon Gtx Women’'s Green dynasty Running Purple black Shoes 1} = Δx, or horizontal change, as shown in the graph provided. It can also be seen that ΔxWomen’s Chelsea Bramhall Boots Ankle Brown Timberland qEOnUxZ 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 Green Women’'s Running Gtx Purple Salomon Pro Shoes black Xa Trail dynasty 3d Xa black Trail Gtx Purple Green Women’'s dynasty 3d Shoes Salomon Pro Running 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})^{Xa Salomon Running Shoes Women’'s Pro Purple black Green 3d dynasty Gtx Trail 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.