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 pair of values satisfying the equation in the graph?
Anthony Or. GeoGebra Institute of Hong Kong.