What Comes Next

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What Comes Next

• Here is a sequence of letters
• O T  T  F  F  S  ____, _____, _____
• What 4 letters come next in this sequence?
• What does the sequence represent?

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Solution

• The next four letters are S, E, N, and T.
• Each letter is the first letter of a number
  written in word form, the numbers being the
  sequence of natural numbers One, Two, Three,
  Four, Five, Six, Seven, Eight, Nine, Ten.

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3-3 The Coordinate Plane
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Coordinate Planes
Y-axis
4 3 2 1 -1 -2 -3 -4

Quadrant One
Quadrant Two
X-axis
-4 -3 -2 -1 0 1 2 3 4
Quadrant Three
Quadrant Four
origin
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An ordered pair is a pair of numbers used to
locate a point on the coordinate plane. The
ordered pair is always listed with the
x-coordinate then the y-coordinate. ( x, y)
Ex. (5, -3)
Quadrant One ( , )
Quadrant Two (-, )
4 3 2 1 -1 -2 -3 -4
-4 -3 -2 -1 0 1 2 3 4
Quadrant Three (-, -)
Quadrant Four (, -)
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To read or write an ordered pair always locate
the x coordinate first.
X -Axis
-4 -3 -2 -1 0 1 2 3 4
( 1, )
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Then locate the y coordinate.
4 3 2 1 -1 -2 -3 -4
( 1, 3 )
Y axis
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The ordered pair at the origin is (0, 0) What are
the ordered pairs for these points?
(3,4)
(-3, 3)
4 3 2 1 -1 -2 -3 -4
(1,1)
-4 -3 -2 -1 0 1 2 3 4
(2, -2)
(-4, 0)
(0, -3)
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Plot the following points on the coordinate
plane. (2, -4) (-1, -1) (3, 2)
(-4, 3)
4 3 2 1 -1 -2 -3 -4
-4 -3 -2 -1 0 1 2 3 4
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When will we use this?

• The coordinate plane is used to locate places on
  a map. Lines of latitude and longitude are used.
  
• Hurricane tracking uses the coordinate plane.

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Summary

• The coordinate plane is used to plot points on a
  graph.
• There are 4 Quadrants in the coordinate plane.
• The x-axis is the horizontal axis, the y-axis is
  the vertical axis.
• Points are written as ordered pairs (x, y).
• To locate a point on a graph locate the
• x-coordinate first and then the y-coordinate.

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The End
Dont Forget Homework- Lesson 3-3 2-22 evens