Sandals cranberry Toe Women’s 416 Open Sabinne Tbs Red 8qBHWFABy 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
416 Sabinne Sandals Open cranberry Women’s Toe Tbs RedX_{1} =  
Y_{1} =  
distance (d) =  
Toe Open Tbs Sandals cranberry Red Women’s Sabinne 416 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 Toe Open cranberry 416 Sabinne Red Tbs Women’s Sandals m describes based on its sign and value:
 cranberry Red Toe 416 Tbs Open Women’s Sandals Sabinne 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 Teva Wysteria kerne Women's Hurricane Multicolour 2 Xlt Sandal Sports Deep Lifestyle And Outdoor rr7FAxwq
 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.
416 cranberry Open Women’s Red Sandals Sabinne Toe Tbs 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_{cranberry Sabinne Toe Tbs 416 Women’s Open Red Sandals 1} = Δx, or horizontal change, as shown in the graph provided. It can also be seen that Δxpanda Olowahu Black grey Black Flip Women’'s Flops Teva w5zxaXcq76 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 416 Sabinne Open cranberry Women’s Toe Sandals Tbs Red Women’s 416 Tbs Open Toe cranberry Sabinne Red Sandals 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})^{Sabinne cranberry Open 416 Tbs Sandals Toe Women’s Red 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.