In physics lab, Charlotte attaches a wireless sensor to one of the spokes of a bicycle wheel spinning freely on its axle. The graph below shows the sensor's height above the ground, in centimeters, over time t, measured in seconds. (1,42), (5,32), (9,42), (13,32)
What is the midline?
The midline is the average value of the maximum and minimum points on the graph.
The maximum points are (1,42) and (9,42), and the minimum points are (5,32) and (13,32).
The average value of the maximum and minimum points is:
(42 + 32) / 2 = 74 / 2 = 37
Therefore, the midline is 37 cm.