A line is represented by the equation x = 6. What is the slope of the line?
a. 0 b. 5/6
c. 6 d. undefined
This is for extra points, that I really need in my algebra II class =).
Go back to your basic definition:
$\displaystyle m = \frac{y_2 - y_1}{x_2 - x_1}$
We can get two points on this line: say (6, 1) and (6, 2).
$\displaystyle m = \frac{2 - 1}{6 - 6} = \frac{1}{0}$
Since we can't divide by 0, this slope is undefined.
Comment:
You have now posted several extra credit questions. I have noticed that many of the solutions depend directly on basic definitions. If the definitions are giving you problems I would strongly recommend you review these with your teacher to make sure you understand them. Otherwise, as I think Aftershock mentioned, none of this will help you.
-Dan