Let's Reflect

Let's Reflect

The following activity will explore reflections using the graphing calculator.

Single Graph for Triangle

Student Activity Sheet

Procedures:

On the graph below create a triangle

	Record the coordinates for the three vertices.
	Turn your calculator on and open up the lists.
	In L1 place the x coordinates for the three vertices. Repeat the x coordinate for A.
	In L2 place the y coordinates for the three vertices. Repeat the y coordinate for B.
	Set up a plot to do a connected line graph for L1 vs. L2.
	Press Zoom: 8 Decimal. What do you see?

	Return to the lists. This time enter the opposite values of L2 in L3.
	Set up a second plot for L1 vs. L3. Make it a line graph also.
	Press Graph. What do you see? How did this happen? Can you describe why this happened to your triangle? If you don’t see your triangle, recheck the Plot Set Up and the names of the coordinates.

	Return to the lists. This time enter the opposite values of L1 in L4.
	Set up a third plot for L4 vs. L2. Make it a line graph also.
	Press Graph. What do you see? How did this happen?

	Set up a third plot for L4 vs. L3. Make it a line graph also.
	Press Graph. What do you see? How did this happen?