If you increase the frequency of a sound wave four times, what will happen to its speed? OA. The speed will increase four times. B. The speed will decrease four times. The speed will remain the same. D. The speed will increase twice. The speed will decrease twice. ​

Sorry my friend i don't know the answer. i am just in 6th

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.