Graphing Linear Equations in 2 Unknowns
In the table, enter at least 4 pairs of values of x and y
(with some of them being negatives or decimals)
satisfying the relation y = x + 2.
Select these values, right-click and choose
“Create List of Points” to plot them on the rectangular
coordinate plane. What do you observe?
Check the box “Mark positions satisfying the relation”.
Drag A to see the positions of A (in red) at which its
coordinates satisfy the equation. What do we can if
we plot ALL the pairs of values satisfying the equation in the graph?
http://www.geogebratube.org/material/show/id/15443 (Download GeoGebra file)
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