C.an equal and opposite reaction
For a given wave in a given medium, if the frequency doubles,
the wavelength becomes 50% shorter.
That is, it becomes half as long as it was originally.
The study of sound is called sonics and the study of sound waves are acoustics
The 3rd Quadrant is the lower left one on a graph,
where ' x ' and ' y ' are both negative.
Your picture is completely unrelated to this question.
Your brother would be described as a speeder.