Use your knowledge of waves and the graph shown to determine the frequency of Wave C.
What does it tell you about the speed of the wave?
100
90

it should be a.

hope it

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this