Algebra Review Objective: Students will be able to demonstrate their ability to plot points on the Cartesian coordinate system.

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Presentation transcript:

Algebra Review Objective: Students will be able to demonstrate their ability to plot points on the Cartesian coordinate system

A Cartesian coordinate system, also known as rectangular coordinate system, can be used to plot points and graph lines. The following is an example of rectangular coordinate system.

 Four Quadrants  In Quadrant I, both x and y are positive  In Quadrant II, x is negative and y is positive  In Quadrant III, both x and y are negative  In Quadrant IV, x is positive and y is negative

 A point is represented by a pair of numbers (x,y).  When given a point to plot, do the following:  Locate where each number is on the x and y-axis respectively.  For the x-axis number, draw (or imagine) a vertical line going through it.  For the y-axis, draw (or imagine) a horizontal line going through it.  The point occurs where the lines meet.

 Note that this means that 2 is the x value and 3 is the y value.  Now, locate 2 on the x-axis and 3 on the y-axis.  Draw (or imagine) a vertical line through x = 2 and a horizontal line through y = 3. Where the lines meet is your point.  End result: