In contrast to Amy's baseline level of 0% problems solved correctly, Amy's intervention phase level rose to
37.5% problems solved correctly. A best-fit line for Amy's intervention performance data does not quite follow a linear pattern. For the first three probe scores, a decidedly positive trend can
easily be seen. The next two scores remain at 30% correct. After the fifth intervention session,
the scores again rise sharply, taking on a similar trend line to the first three session scores.