Study GuideAlgebra I–Coordinate Geometry1. Coordinate GraphsIntroduction to Coordinate GeometryCoordinate geometry helps usdraw and study points, lines, and shapes on a gridcalled thecoordinate plane(or coordinate graph).You may already know that every point on anumber linerepresents a number.In the same way, every point on acoordinate planeis represented bytwo numbers.These two numbers showexactly where a point is locatedon the graph.To understand how this works, we use two special lines calledcoordinate axes.•Thehorizontal lineis called thex-axis.•Thevertical lineis called they-axis.These two lines cross each other at a point called theorigin.Theoriginrepresents the coordinate(0, 0).Preview Mode
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