Final answer:
To display the turtle's current x and y coordinates, use the 'turtle.xcor()' and 'turtle.ycor()' functions in the turtle graphics system.
Step-by-step explanation:
To display the turtle's x-coordinate and y-coordinate in the context of the turtle graphics system, you would use the commands turtle.xcor() and turtle.ycor(). These functions return the current x and y position of the turtle on the screen. Understanding how coordinates work is essential, as the coordinate system determines the position of the turtle within the graphical window. To calculate displacement, which is the change in position of the turtle, you would use the equation Ax = x₁ - xo, where xo is the initial x position and x₁ is the final x position. This is especially useful in scenarios where you need to track or use the turtle's movement within your program.