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# Intro to Coordinate System

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by

## Tammy Ply

on 10 March 2018

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#### Transcript of Intro to Coordinate System

If two perpendicular lines intersect on a grid, they form the ________________.
The axes divide the coordinate
plane into 4 ___________.
The lines are called _______.
The horizontal axis is the _______________.
The vertical axis is the _____________________.
The point where the x-axis and y-axis intersect, ( , ), is called the _______.
coordinate system
axes
x-axis
y-axis
I
II
III
IV
y-axis
x-axis
0 0
I
II
III
IV
y-axis
x-axis
(0, 0)
origin
origin
The first number of an ordered pair
I
II
III
IV
y-axis
x-axis
Moving up or to the right on the coordinate plane is _______.
Moving down or to the left on the coordinate plane is ________.

I
II
III
IV
0 1 2 3 4
-4 -3 -2 -1
-4
-3
-2
-1
4
3
2
1
0
positive
negative
ordered pair
left
right
origin
(2, 1)
The second number of an ordered pair
I
II
III
IV
y-axis
x-axis
up
down
An ___________ is a pair of numbers that tell
you where on the coordinate plane a specific
point is located.
(2, 1)
tells how
far to move _____ or _____ from the _____.
tells how
far to move ____ or _____ from the origin.
What are the coordinates
for this point?
I
II
III
IV
0 1 2 3 4
-4 -3 -2 -1
4
3
2
1
-4
-3
-2
-1
0
.
What are the coordinates
for this point?
I
II
III
IV
0 1 2 3 4
-4 -3 -2 -1
4
3
2
1
-4
-3
-2
-1
0
.
I
II
III
IV
0 1 2 3 4
-4 -3 -2 -1
4
3
2
1
-4
-3
-2
-1
0
.
And this one?
I
II
III
IV
0 1 2 3 4
-4 -3 -2 -1
4
3
2
1
-4
-3
-2
-1
0
.
Here's another . . .
I
II
III
IV
0 1 2 3 4
-4 -3 -2 -1
4
3
2
1
-4
-3
-2
-1
0
.
and another . . .
I
II
III
IV
0 1 2 3 4
-4 -3 -2 -1
4
3
2
1
-4
-3
-2
-1
0
.
Let's practice!
You will see a blank coordinate grid on the paper you received earlier. Use it to plot the following coordinates.
(4, 0)
(4, 1)
(4, 2)
(3, 3)
(2, 4)
As we plot each point, we will connect them to form a hidden picture.
(1, 4)
(0, 4)
(-1, 4)
(-2, 3)
(-3, 2)
(-3, 1)
(-3, 0)
(-3, -1)
(-2, -2)
(-1, -3)
(0, -3)
(1, -3)
(2, -3)
(3, -2)
(4, -1)
(4, 0)
This Line Ends
(0, 1)
(0, 2)
(-1, 2)
(-1, 1)
(0, 1)
Shade-in the enclosed space, and then start a new line beginning with the next point.
(1, 1)
(1, 2)
(2, 2)
(2, 1)
(1, 1)
(-1, 0)
(0, -1)
(1, -1)
(2, 0)
Guess that'll do it for today!!
Introduction
to the
Coordinate System

Introduction
to the what?!?
You know . . .
the Coordinate System.
The Coordinate System was invented by Rene Descartes,
a man who lived in the 1600s.
As the story goes . . .
Descartes was lying in bed one morning when he noticed a fly crawling on the ceiling.
Being the great thinker that he was, Descartes wondered how he could describe the fly's position on the ceiling to another person.
After some thought, Descartes realized that he could pinpoint the fly's
location by describing
its distance from two
intersecting walls.
Descartes soon recognized that he could locate any point on a flat surface using the same method.
Presto!
The Coordinate System was born!
Whether or not the story is true, Descartes is credited with inventing a system that is widely used today.
Sometimes called the Cartesian Coordinate System in Descartes' honor,
the coordinate system is used in many, many ways.
From space technology . . .
to video game development . . .
roller coaster design . . .
and much, much more . . .
The
Coordinate System
is essential.
Since it's so important . . .
what do you say we learn something about it?
medical technology . . .
Don't you agree that this was a great . . .
Please complete the notes that you were given earlier as we proceed through this lesson.
Remember that when plotting a point on the coordinate grid, you always count left or right before you count up or down.
Start a new line beginning with the next point.
This Line Ends
Shade-in the enclosed space, and then start a new line beginning with the next point.
This Line Ends