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