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The following applications may take some time to load depending on connection speed. Please wait. The angle between the positive x-axis and the line is called the slope angle. The tangent of the slope angle is called the slope of the line. Slope of a line is denoted by "m".The slope of a line can be positive, negative, zero or undefined. If the line slopes downwards to the right, it has a negative slope. As x increases, y decreases. If the line sloped upwards to the right, the slope would be a positive number. As x increases, y also increases. If the line is horizontal, i.e the line is parallel to x-axis, then the slope of the line is zero. If the line is vertical, i.e the line is parallel to y-axis, then the slope of the line is undefined.You can investigate the applications by moving the empty squared points.
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Solids