A submarine is currently being developed to take tourists on sightseeing trips to tropical coral reefs. According to engineering guidelines the sub must be able to withstand a pressure of 10.09 N per square millimeter. Required:
a. To what depth can the submarine safely descend in seawater?
b. If the submarine is used in freshwater instead, is its maximum safe depth greater than, less than, or the same as the seawater? Explain

Yup no bull frogs here man

Answer choices? if there is any

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.