 The first branch in the sub-hierarchy deals, mainly, with functional graph reading.For attribute A5, the examinee must be able to map the graph of a familiar function with its corresponding function.In an item that requires attribute A5 (e.g., item 4), attribute A4 is typically required because the examinee must find random points in the graph and substitute the points into the equation of the function to find a match between the graph and the function.