Transcript Plotting Points - Delta State University

Plotting Points In A
Coordinate System
How Do You Plot Points?
Before plotting points on
a graph, you first have to
understand the X and Y
axis.
The X and Y axis are
number lines that run
horizontally and vertically
on the coordinate system.
An example of a set of
coordinates for a point is
(5,2), which is marked
with the blue dot in the
coordinate system on the
right.
The X Axis
The X axis is the
horizontal number line
of the graph.
The X axis is
numbered with
positive coordinates
on the right and
negative coordinates
on the left with zero in
the middle.
The Y Axis
The Y axis is the
vertical number line
on the graph.
The Y axis is
numbered with
positive coordinates
on the top and
negative coordinates
on the bottom of the X
axis.
4 Quadrants
The X and Y axis together form 4 different
quadrants.
The first quadrant is labeled with roman
numeral I. A point in the 1st quadrant has
both positive X and Y coordinates.
The second quadrant is labeled with roman
numeral II. A point in the 2nd quadrant has a
negative X coordinate and a positive Y
coordinate.
The third quadrant is labeled with roman
numeral III. A point in the 3rd quadrant has
both negative X and Y coordinates.
The fourth quadrant is labeled with roman
numeral IV. A point in the 4th quadrant has a
positive X coordinate and a negative Y
coordinates.
The green dot is the origin. The origin is
where the X axis and the Y axis cross. The
coordinates of the origin are (0,0)
Plotting The Point
How do you find the point (2,3)
within the coordinate system.
The first number (in this case
2) is the X coordinate.
The second number (in this
case 3) is the Y coordinate.
This point would be 2 over on
the X axis and 3 up on the Y
axis.
The point (2,3) is labeled with
a red dot in the coordinate
system.
Maze Game
The Maze Game allows students to practice
their point plotting skills by having them move a
robot through a mine field to a specific point in
the coordinate system. They move the robot by
entering the coordinates of the point they want
the robot to move next. To accomplish the
mission, you must move the robot to the desired
safe spot in the coordinate system (marked by a
green point) without going over any mines.
http://www.shodor.org/interactivate/activities/coor
ds/index.html
Works Cited
Introduction to the Coordinate Plane
and Coordinates Discussion; 4/19/04.
http://www.shodor.org/interactivate/discuss
ions/fd2.html
The x – y Plane – 1; 4/19/04.
http://www.purplemath.com/modules/plane
.htm