This presentation shows how to plot a straight line graph from a horizontally aligned table of x and y values. To plot a graph using a values table we follow these steps: Step 1) Write the table out as a set of (x,y) coordinates. Step 2) Rule up an X-Y grid on graph paper. Step 3) Plot the points onto the grid. Step 4) If the points from a pattern, then use a ruler to join the points together. Step 5) Extend the line to fill the grid, and add arrows to both ends. To obtain a PowerPoint format download of this presentation, go to the following page: http://passyworldofmathematics.com/pwerpoints/

1. Plotting Linear Graphs
from X-Y Values Tables
X -2 -1 0 1 2
Y -1 0 1 2 3

2. Plotting Points on the X-Y Grid
X -2 -1 0 1 2
5
Y -1 0 1 2 3
The above table represents
-3 3
the following (x,y) points:
(-2,-1) (-1,0) (0,1) (1,2) (2,3)
-5

3. Plotting Points on the X-Y Grid
X -2 -1 0 1 2
5
Y -1 0 1 2 3
When the above (x,y) points:
-3 3
(-2,-1) (-1,0) (0,1) (1,2) (2,3)
-5
Are plotted on the X-Y grid, they
form a straight line pattern.

4. Plotting Points on the X-Y Grid
X -2 -1 0 1 2
5
Y -1 0 1 2 3
When the plotted (x,y) points:
-3 3
(-2,-1) (-1,0) (0,1) (1,2) (2,3)
-5
are connected together, they
form a perfect straight line.

5. Plotting Points on the X-Y Grid
X -2 -1 0 1 2
Y -1 0 1 2 3 5
To finish the graph, the
straight line is extended and
arrows are added to each end. -3 3
This shows that if we kept
adding points to the line, it -5
would extend forever in both
directions.

6. http://passyworldofmathematics.com/