Triangle ABC if reflected across the y axis. If the coordinates of the original shape are A(-4,-1), B(-5,-2), and C(-10,-1), what are the the coordinates of A’,B’, and C’?
When a point is reflected across the y-axis, the x-coordinate changes sign. The y-coordinate remains the same.
For point A(-4, -1), the reflected point across the y-axis, A', will have the same y-coordinate, but the sign of the x-coordinate will change. Thus, A' will have coordinates (4, -1).
Point B is (-5, -2), so its reflected point B' will be (5, -2).
Point C is (-10, -1), so its reflected point C' will be (10, -1).
Therefore, the coordinates of A', B', and C' are (4, -1), (5, -2), and (10, -1) respectively.