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Learn about symmetry in graphs with respect to x-axis, y-axis, and origin. Discover tests to determine symmetry and enhance your graphing skills.
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Symmetry • A graph is said to be symmetric with respect to the x-axis if for every point (x,y) on the graph, the point (x,-y) is on the graph.
A graph is said to be symmetric with respect to the y-axis if for every point (x,y) on the graph, the point (-x,y) is on the graph.
A graph is said to be symmetric with respect to the origin if for every point (x,y) on the graph, the point (-x,-y) is on the graph.
Tests for Symmetry • x-axis Replace y buy -y in the equation. If an equivalent equation results, the graph is symmetric with respect to the x-axis. • y-axis Replace x buy -x in the equation. If an equivalent equation results, the graph is symmetric with respect to the y-axis. • origin Replace x buy -x and y buy -y in the equation. If an equivalent equation results, the graph is symmetric with respect to the origin.