There are two types of Reflections, so there are two rules you need to remember. A reflection problem might say something like:
The vertices of figure JKLM are J(-4,-2), K(-2,-2), L (-1,-4), M (-5,-4). Graph the figure and its image after a reflection over the Y-axis.
Step 1: Plot the coordinate points and connect the dots, like this:
Step 2: Since we are reflecting over the Y axis, we need to know the rule for this. (Checking page 508, top)...Here it is: The Y coordinate stays the same, and we change the sign on the X coordinate. The new coordinates are:
J(4, -2), K(2,-2), L(1,-4), M(5,-4)
Step 3: Plot the new coordinates, and draw the new figure. Like this:
For a reflection over the X axis, check the top of page 508 and know that rule, too.
Step 4: Go to the next problem
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