**Algebra Xpresser Lab - More Lines!**

**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.