# Lesson for Glencoe Algebra I Math

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Lesson for Glencoe Algebra I Math
The Coordinate Plane By: Stan Blackman Jay High School Lesson for Glencoe Algebra I Math Section 4-1 Algebra I Glencoe Mathematics 2004 The McGraw Hill Companies Inc.

Vocabulary Words Axes - two perpendicular number lines used for locating points Origin – the intersection of the two axes Y-axis – the vertical number line X-axis – the hoizontal number line

The four quadrants of the coordinate plane.

Signs of the quadrants. Y-axis (+,+) (-,+) X-axis (-,-) (+,-)

The Ordered Pair (5,10) X- coordinate Y- coordinate

The Origin Point Y-axis Origin Point (0,0) X-axis

Always start at the origin to plot a point.

Direction of Movement for the X-Coordinate
Y-axis If the x-coordinate is positive move this way If the x-coordinate is negative move this way X-axis

Direction of movement for the Y-coordinate
Y-axis If the y-coordinate is positive move this way If the y-coordinate is negative move this way X-axis

Name the given point. Y-axis (1,3) (-2,1) X-axis (-5,-1) (4,0)

How To Plot a Point on the Coordinate Plane
Y-axis (4,4) Next move on the Y-axis X-axis (-3,-1) First move out on the X-axis