Ordered Pairs

1
Ordered Pairs

• An ordered pair comes in the form (x,y) with x
  always first and y always second
• The x value refers to the numbers on the x axis
• The y value refers to the numbers on the y axis

2
Coordinate Plane

• The coordinate plane consists of 4 quadrants
• Starting in the upper right hand corner with
  quadrant 1 and moving counterclockwise to
  quadrant numbers 2, 3, 4.
• There are 7 different places in the coordinate
  plane. What are they?

3
Coordinate Plane
Y
Quadrant II
Quadrant I
Origin
X
Quadrant III
Quadrant IV
4
Plotting Points

• To plot a point on the x,y axis, always start at
  the origin.
• Using the x value, move left or right on the x
  axis depending on whether the x value is positive
  or negative.
• Using the y value, move up or down on the y axis
  depending on whether the y value is positive or
  negative.

5
More on plotting points

• For every 1 point on a graph it takes two numbers
  to identify the correct location.
• Think of a game of Bingo as it needs both a
  letter and a number to identify the correct
  square.

6
Plot the Point (2,3)
Y
up 3
X
over 2
(2,3)
7
Plot the Point (-2,-1)
Y
X
(-2, -1)
8
How is each Pt. Different?
Y
(-2,2)
(2,3)
X
(3,-1)
(-2,-1)