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# Plotting Straight Lines from Values Tables

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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/

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### Plotting Straight Lines from Values Tables

1. 1. Plotting Linear Graphsfrom X-Y Values Tables X -2 -1 0 1 2 Y -1 0 1 2 3
2. 2. Plotting Points on the X-Y GridX -2 -1 0 1 2 5Y -1 0 1 2 3The above table represents -3 3the following (x,y) points:(-2,-1) (-1,0) (0,1) (1,2) (2,3) -5
3. 3. Plotting Points on the X-Y GridX -2 -1 0 1 2 5Y -1 0 1 2 3When the above (x,y) points: -3 3(-2,-1) (-1,0) (0,1) (1,2) (2,3) -5Are plotted on the X-Y grid, theyform a straight line pattern.
4. 4. Plotting Points on the X-Y GridX -2 -1 0 1 2 5Y -1 0 1 2 3When the plotted (x,y) points: -3 3(-2,-1) (-1,0) (0,1) (1,2) (2,3) -5are connected together, theyform a perfect straight line.
5. 5. Plotting Points on the X-Y GridX -2 -1 0 1 2Y -1 0 1 2 3 5To finish the graph, thestraight line is extended andarrows are added to each end. -3 3This shows that if we keptadding points to the line, it -5would extend forever in bothdirections.
6. 6. http://passyworldofmathematics.com/