Graphing Linear Equations in 2 Unknowns

[list=1] [*]In the table, enter at least 4 pairs of values of [i]x[/i] and [i]y[/i] (with some of them being negatives or decimals) satisfying the relation [i]y[/i] = [i]x[/i] + 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? [/list]

Anthony Or. Education Bureau, Hong Kong.