Graphing Numbers in the Coordinate Plane

Graphing Basics

Intro to the coordinate plane

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Coordinate Plane Graphing

Horizontal Number Line

• Which end to the positive numbers lie?

• and the negative numbers?

Now we have two number lines.

The original number line still goes left and right, but the new number line goes up and down. Now we have a two dimensional representation. The two number lines combined are called a coordinate plane. We can not only put numbers on our number lines, but also to the left, right, up, and down of the number lines.

Horizontal Number Lines

Positives count right

Negatives count left

Vertical Number Line

• Which end to the positive numbers lie?

• and the negative numbers?

Vertical Number Lines

Positives count up

Negatives count down

Now imagine overlapping a vertical and horizontal number line at the zeros

The Coordinate Plane

The horizontal number line is call the x-axis

The vertical number line is called the y-axis

The Coordinate Plane

• The number lines intersect at the origin, point (0, 0) 

• The graph is split into 4 sections call quadrants.

• Notes where quadrant 1, II, III, and IV are located.

• Time to show what you know...

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Multiple Choice

The __ - axis is the horizontal axis of the coordinate plane.

• X

• Y

• Z

• None of the above

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Multiple Choice

The __ - axis is vertical in the coordinate plane.

• X

• Y

• Z

• None of the above

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Multiple Choice

The coordinates for the origin in the coordinate plane are________?

• (1,1)

• (0,0)

• (0,1)

• (1,0)

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Multiple Choice

How many quadrants are in a coordinate plane?

• 1

• 2

• 3

• 4

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Multiple Choice

(3, 4) is an example of...

• numbers in parenthesis

• an ordered pair

• labels

• fractions

How to plot a point

• Start your pencil at the origin

• Use the x-coordinate to decide how far left (if negative) or right (if positive) to move

• Use the y-coordinate to decide how far down (negative) or up (positive) to move

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Multiple Choice

When plotting points in a coordinate plane, which directions should you go first?

• left or right

• up or down

• left

• up

Multiple Choice

Give the coordinates for POINT B.

• (4, -2)

• (-3, 4)

• (4, -4)

• (4, -3)

Multiple Choice

Give the coordinates for POINT C.

• (4, -2)

• (-2, 4)

• (-2, -4)

• (4, 2)

Multiple Choice

Give the coordinates for POINT H.

• (-1, 2)

• (1, -2)

• (-1, -2)

• (1 , 2)

Multiple Choice

Give the coordinates for POINT I.

• (-2, 5)

• (-2, -5)

• (2, 5)

• (2, -5)

Multiple Choice

What is the ordered pair for point A?

• ( 2, 0)

• ( 0 , 2)

• (0, -2)

• (-2,0)

Multiple Choice

What point is at (-3,3)?

• F

• H

• J

• C

Multiple Choice

If you were to plot the point (4, -12) what would be the correct method?

• Up 4, left 12

• Right 4, up 12

• Down 4, left 12

• Right 4, down 12

Multiple Choice

In the ordered pair, (7, -7), first I would move ____ then ____.

• Left, Down

• Left, Up

• Right , Up

• Right , Down

Poll

Do you understand? Rate where you think you are...

• Awesome... I got this!

• I think I'm doing okay

• I may need a little help

• What just happened?! I'm totally lost!

How did you do?

I will post a link that you can use to run through this lesson again for practice if needed.