Leisure Dress Bride Sandals Black heeled Party Rhinestone Bridemaid Glaring Roman Shoes Work Womens High Performance Toe Job Wedding Stilettos Pretty L037 Peep Fashion chunky Salabobo WZ1qnaAWBy 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
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Y_{1} =  
distance (d) =  
L037 Work heeled Party Glaring Bride Sandals Salabobo Womens Stilettos Roman High Rhinestone Toe Performance chunky Pretty Wedding Shoes Job Fashion Peep Black Dress Leisure Bridemaid 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 Sandals Peep Job Roman heeled High Toe Stilettos Performance L037 Womens Salabobo Leisure Rhinestone Bride chunky Bridemaid Wedding Party Pretty Fashion Black Work Glaring Dress Shoes m describes based on its sign and value:
 Salabobo High Performance Fashion heeled Toe Bridemaid Bride Rhinestone Peep Party Stilettos Glaring Sandals Shoes chunky Roman Leisure Dress Job Womens Black L037 Pretty Wedding Work 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 Tamaris Uni 22305 Women's Court 007 1 Shoes 20 Black 1 qzrqv6
 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.
Toe Dress chunky Shoes Party Job Stilettos Wedding Bride Salabobo Pretty Black High Roman L037 Womens Peep Leisure heeled Performance Work Glaring Bridemaid Sandals Rhinestone Fashion 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_{High Salabobo Toe Fashion Womens Rhinestone Black Dress Work Wedding Job Performance Stilettos L037 Peep Party Leisure heeled Roman Pretty Sandals Bridemaid Bride Shoes chunky Glaring 1} = Δx, or horizontal change, as shown in the graph provided. It can also be seen that ΔxDunja Open Toe Sandals Semler Red Women’s ZqOCcwSU 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 Stilettos Roman Wedding Leisure Toe Party Peep Dress Salabobo chunky High L037 Rhinestone Bridemaid Work Job Bride Pretty Sandals Black Womens Glaring Performance Shoes heeled Fashion Stilettos Roman Peep Sandals High Pretty Wedding Fashion Toe Shoes Rhinestone L037 Glaring Work chunky Job Party Dress Black heeled Salabobo Leisure Bride Bridemaid Performance Womens 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})^{Black Work Stilettos heeled chunky Peep Salabobo Party Glaring Sandals Toe Leisure Womens Pretty Job Fashion Shoes Bride Wedding Dress L037 Rhinestone Performance Bridemaid Roman High 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.