Which type of transformation is described by (x, y) → (-x, y)? A) a reflection across the y-axis Mac B a rotation of 90° about the origin © a dilation of scale factor - 1 D a rotation of 180° about the origin​

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?