Find the Slope of the Line Determined by the Equation $9 x + 10 y = 11$

Multiple Choice

Find the slope of the line determined by the equation.? $9 x + 10 y = 11$ ?

A) $m = - 9$
B) $m = 9$
C) $m = - \frac { 9 } { 10 }$
D) $m = \frac { 11 } { 10 }$
E) $m = - 10$