1) A function in when there is only one y for that x. (In other words it passes the vertical line test.)
2) Continuous means there are no breaks.
3) For x values less than -2, the graph is going up.
4) Between x values -2 and 8, the graph is going down.
5) After the x value 8, the graph starts to increase again.
6) The graph should only pass the x axis at 5, and only pass the y axis at 2.
Hope this helps.