Algebra Xpresser Lab - More Lines!

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1) Using Algebra Xpresser, graph the following equations:

y = x

or y = -x

Describe what you notice about the lines? __________________


2) Now go back to the window, and clear out what was there. Type in:

y = x
or y = -2x

Describe what you notice about these lines. ___________________

3) Now go back to the window and clear our what was there. Type in:

y = - x

or y = x

Describe what you notice about these lines. ___________________

4) What equation would you have to use to get lines like the ones above for the equation
y = 5x? ___________________ (Check and see if you were right!)

5) Graph the following pairs of equations. What do you notice about their graphs?

y = 2x

or y = 2x + 1

6) Clear our your screen. Now graph the following pairs of equations. What do you get?

y = - x + 1

or y = - x - 5

7) Write down a pair of equations that will give the same results. ___________________

8) Make a rule to show that two equations are perpendicular. Make a rule to show that two equations are parallel. State them below.