Arionna needed to graph triangle PQR reflected across the y-axis. Her work is shown below. Arionna’s Work:
Blue right-arrow red. P (3,7) right arrow P prime (3, negative 7). Q (0, 4) right-arrow Q prime (0, 4). R (5, 8) right-arrow R prime (negative 5, 8).

Arionna’s Graph
On a coordinate plane, a red triangle has points (negative 7, 3), (negative 5, 8), (0, 4). A blue triangle has points (0, 4), (3, 7), (5, 8).

Which statements identify her errors? Check all that apply.
Arionna did not find the correct point for P’. She should have negated the x-value, not the y-value.
Arionna did not find the correct value for Q’. All points in a reflection will move.
Arionna did not find the correct value for R’. She should have negated the y-value, not the x-value.
Arionna’s red triangle should be reflected below the horizontal axis rather than across the vertical axis.
Arionna switched the order of the coordinates of P’ (3, –7) when she graphed them.