[list=1][br][*]In the table, enter at least 1 pair of values of [i]x[/i] and [i]y[/i] satisfying the relation [i]y[/i] = [i]x[/i] + 2.[br][/*][*]Select (highlight) these values, right-click and choose “Create" --> "List of Points” to plot them on the rectangular coordinate plane. With that one point how many lines can you create?[br][/*][*]How many ordered pairs do you need to make a unique line?[/*][/list]

Anthony Or. GeoGebra Institute of Hong Kong.