#### Answer

The slope is undefined.
The line that passes through the given points is vertical.

#### Work Step by Step

RECALL:
(1) The slope $m$ of a line can be found using the formula $m=\dfrac{y_2-y_1}{x_2-x_1}$.
(2) A line with a positive slope means the line rises from left to right. A negative slope means the line falls from left to right.
(3) A zero slope means the line is horizontal. An undefined slope means the line is vertical.
Solve for the slope using the formula in (1) to obtain:
$m=\dfrac{5-(-4)}{3-3}=\dfrac{5+4}{0}$ (slope is undefined)
The slope is undefined, so the line is vertical.