The rule for reflecting over the X axis is to negate the value of the ycoordinate of each point, but leave the xvalue the same For example, when point P with coordinates (5,4) is reflecting across the X axis and mapped onto point P', the coordinates of P' are (5,4) When you reflect a point across the xaxis, the xcoordinate remains the same, but the ycoordinate is transformed into its opposite (its sign is changed) If you forget the rules for reflections when graphing, simply fold your paper along the xaxis (the line of reflection) to see where the new figure will be locatedRule Let y = f(x) be a function In the above function, if we want to do reflection through the yaxis, x has to be replaced by x and we get the new function y = f(x) The graph of y = f(x) can be obtained by reflecting the graph of y = f(x) through the yaxis It can be done by using the rule
Reflecting Figures In Coordinate Space Krista King Math Online Math Tutor
Reflection across the y=x axis rule