[size=150]Move the axis of symmetry to the line y = -2. Recall that this is a horizontal line parallel to the x-axis. Make sure that point A is on (1, 4). [br][br][/size][size=150]How is this similar to reflecting across the x-axis? How is it different from reflecting across the x-axis? What are the coordinates of A'? Could you write the coordinate notation (or algebraic rule)?[/size]
[size=150][color=#ff0000]This transformation is similar to reflecting across the x-axis because the x-coordinate remains the same. Since we are farther away from the axis of symmetry, we have a farther distance to reflect. [br][br]To find the image of a new point, count how far away the point is from the axis of symmetry. For example, since A is 6 units away from the line y = -2, we need to count 6 units on the opposite side to get A'. The point A' is at (1, -8). [br][br]The coordinate notation is difficult to write because the points could be on either side of the line of symmetry. We will not ask you for the rule when the line of reflection is a horizontal or vertical line, unless it is the x-axis or y-axis.[/color][/size]