If your screen is not partitioned into three frames, press here to bring up the frames that will enable you to use these quizzes. The graph of a non-linear functions must cross at least one axis. A ratio of two linear functions is always non-linear.
Some parabolas cross neither axis.
Any situation that can be modeled with a sine curve can also be modeleld with a cosine function. Any situation that can be modeled with a cosine curve can also be modeleld with a sine function.