Determine the Slope of the Line $m = - 3$ B) $m = - \frac { 1 } { 3 }$

Determine the slope of the line.
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A) $m = - 3$
B) $m = - \frac { 1 } { 3 }$
C) $m = 3$
D) $m = \frac { 1 } { 3 }$