PLSSS HELP WILL MARK BRAINLIEST! (reflections)
Quadrilateral PQRS is located in the first quadrant of a coordinate plane. One of its vertices, P, is located at (1, 7). If the quadrilateral is reflected across the y-axis, what is the location of point P'?

(-7, 1)
(7, -1)
(1, -7)
(-1, 7)