Mac measured the density of silver three times and obtained the following results: Trial 1: 10.6 g/cm3; Trial 2: 10.8 g/cm3;
Trial 3: 9.6 g/cm3.
Silver has a density of 10.5 g/cm3

Which trial had the greatest percent error?

Iam on that question know can you tell me the answer i am realy strruglingasap

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.