Pentagon PQRST and its reflection, pentagon P'Q'R'S'T', are shown in the coordinate plane below:
Pentagon PQRST and pentagon P prime Q prime R prime S prime T prime on the coordinate plane with ordered pairs at P negative 4,
What is the line of reflection between pentagons PQRST and P'Q'R'S'T'? (2 points)
x = 1
y = x
x = 0
y = 0