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4–9Algebra: Ordered Pairs and FunctionsMAIN IDEA• Use ordered pairsto locate points andorganize data.BUILD YOUR VOCABULARY (pages 86–87)The coordinate plane is formed when twointersect at their zero points. This point is called the origin.Thenumber line is the x-axis and thenumber line is the y-axis.Ordered pairs name points on the coordinate plane. Thenumber in an ordered pair is the x-cooordinate,and thenumber is the y-coordinate.EXAMPLE Name Points Using Ordered PairsWrite the ordered pair that names point S.Step 1 Start at the origin. Move righty3along the until you areS E2under point S. The x-coordinate1xof the ordered pair is .O1 2 3Step 2 Now move up until you reachpoint S. The y-coordinate is .So, point S is named by the ordered pair .Check Your Progress Write the ordered pair that namespoint E.y3E2Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.1O1 2 3x106 Math Connects, Course 1