Linear equation A polynomial equation of the first degree, such as x y = 7 Transform linear equations Horizontal Parallel to or in the plane of the horizon. Rise and Run The pitch of an inclined surface or member, usually expressed as the ratio of the vertical rise to the horizontal span. It functions like a map that follows directions from one point to another. Slope The rate at which an ordinate of a point of a line on a coordinate plane changes with respect to a change in the abscissa. A coordinate plane is a tool used for graphing points, lines, and other objects. Intersecting To cut across or through X-intercept The x-coordinate of a point where a line, curve, or surface intersects the x-axis Y-intercept Where a straight line crosses the Y axis of a graph. In mathematics, the ordinate and abscissa are respectively the second and first coordinates of a point in a coordinate system. Intersection The point or locus of points where one line, surface, or solid crosses another. A line segment lies between any two points on a line Line Segment A quantity, such as velocity, completely specified by a magnitude and a direction. For example, if the location of a point is denoted by (5,8) in Cartesian coordinate geometry, then 5 is the abscissa, and 8 is the ordinate. Line Any straight one-dimensional geometrical element whose identity is determined by two points. Graph Maths a structure represented by a diagram consisting of points (vertices) joined by lines (edges) Scale A system of notation in which the values of numerical expressions are determined by their places relative to the chosen base of the system Interval A set of numbers consisting of all the numbers between a pair of given numbers along with either, both, or none of the endpoints. Always written first in an ordered pair of coordinates such as (12,5). Quadrants I, II, III and IV A circular arc of 90° one fourth of the circumference of a circle Point An element in a geometrically described set. The horizontal ('x') value in a pair of coordinates. Abscissa definition and meaning The abscissa is a geometric coordinate of a point, which is useful to know how far the point is from origin in horizontal direction in two dimensional Cartesian coordinate system. Axes The line about which a rotating body, such as the earth, turns Origin The point in a Cartesian coordinate system where the axes intersect.
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