This exercise is going to show you how to get values from the graph. From the graph below, to get the y value of say x = 3.14, first, type in x = 3.14 into the input column. A line will be drawn intersecting the graph. Next select the intersecting icon [icon]/images/ggb/toolbar/mode_intersect.png[/icon] from the drop down under the points icon [icon]/images/ggb/toolbar/mode_point.png[/icon]. Next, click on the 2 lines, the graph line and the x=3.14 line. A point should be made on the intersection point. You can now read the y value from the point in the input column. (3.14,y value). [br]You can clear the intersecting line x=3.14 either by selecting it and deleting it or just hide it by clicking grey colour dot beside the equation of the line in the input column.[br][br]Try finding the value of x when y=1.2.

Another faster way would be to use the point icon [icon]/images/ggb/toolbar/mode_point.png[/icon] and click at any point of the graph. To ensure the point is exactly on the graph, see that the graph is highlighted first before clicking. Using the select tool[icon]/images/ggb/toolbar/mode_move.png[/icon], move the point along the graph until you get the desired values. This method is however less accurate.