A graph of five athletes' track scores shows an overall improvement as the amount of trials increases, but after a while, the scores dip, due to fatigue. This single change of trend direction represents which type of equation? A.quadratic B.quartic C.cubic D.linearYou have a set of test scores with values ranging from 1 to 100, and want to plot the scores in 5 intervals of 20 points each. Which Excel chart should you use? A.histogram B.pareto C.box & whisker D.waterfall