With the help of their science teacher, Kaden and Mariam made a machine that can move a slinky back and forth. This motion creates a fast-moving wave in the slinky. The image below is a model of a wave that is generated by the machine. The frequency of the wave modeled in the image is 4 Hz.
What is the speed of the wave?
A.
1.25 m/s
B.
0.75 m/s
C.
12 m/s
D.
24 m/s