Plotting Points on a Cartesian Plane Presenters: Mr. Gayle Mrs. McDonald Mr. Allen April 3, 2013

OBJECTIVES 1. Locate a given ordered pair on a grid. 2. Plot a given ordered pair on a grid. 3.Explain how a knowledge of coordinate geometry is applicable to real-life.

REVISION 1.Name the two axes found on a Cartesian plane. 2.On a grid, which axis runs… (a) vertically?(b) horizontally? 3.How many quadrants are there on a grid? The X axis and the Y axis 4 quadrants The X axis The Y axis

4.In which quadrant would an ordered pair of two negative values be plotted? 5.In which quadrant are the X values negative and the Y values positive? 6.What is the name given to the point where the axes intersect? Quadrant 3 Quadrant 2 The origin

5 steps to the left. 2 steps up Help Captain Jack find his treasure. Here is the clue:

From the origin, (0, 0), positive integers indicate movements to the right and up along the x and y axes respectively. LOCATING A POINT

From the origin, (0,0), negative integers indicate movements to the left and down along the x and y axes respectively. LOCATING A POINT

The points that will be located are known as an ordered pair (coordinates) and comes in the form of (x, y) or (x value, y value) The ordered pair will always meet at a point. This is the intersection of the x and y coordinates. LOCATING A POINT

LOCATE THE POINTS, K, T & W

The points that will be plotted are known as an ordered pairs (coordinates) and comes in the form of (x, y) or (x value, y value) The ordered pair will always meet at a point. This is the intersection of the x and y coordinates. Let’s Now Plot Some Points Together PLOTTING A POINT

A ( 2, 3 ) (X, Y) B ( 5, 7 ) A B C ( -4, 6) D (-9, 1 ) E (-3, -6) F (-7, -8) G ( 4, -7) H ( 9, -4) C D E F G H

Access the internet. Go to web address: Select the most suitable response in each of the given questions. GROUP ACTIVITY

Complete the given worksheet. Plot the given coordinates (-10,1), (8,1), (6,-4), (-5,-4) end of sequence. (-5,2), (-1,2), (-1,7) end of sequence. (1, 2), (6,2), (1, 10) end of sequence. Identify the shapes and name the object formed. CULMINATING ACTIVITY

Remember these guidelines when you locate and plot coordinates on the Cartesian plane. The points that will be located or plotted are known as an ordered pairs (coordinates) and comes in the form of (x, y) or (x value, y value) The ordered pair will always meet at a point. This is the intersection of the x and y coordinates. RECAPITULATION

Always begin locating or plotting your ordered pairs from the origin (0,0). Each first value in an ordered pair represents the x coordinate, and each second value represents the y coordinate. RECAPITULATION

Conduct a research on how coordinate geometry is applicable to real life. HOME WORK