1) Make sure that "Show Coordinates" and "Show Axes" is checked on the right side. [br]2) Below, press the 6th button with the green triangle.[br]3) Select the black line that is graphed. The slope will be displayed, copy the slope onto your hand out.[br]4) Press the 4th button (Parallel Line).[br]5) Put a point anywhere on the graph. [br]6) Press the black line again. A new line through the white point you made should appear.[br]7) Press the 6th button again.[br]8) Press the new line you just created. [br]9) What do you notice about the slope of these two lines?[br]10) Press the 5th button (Perpendicular lines)