#### Answer

$$m=\dfrac{9}{4}$$

#### Work Step by Step

RECALL:
The standard form of a line's equation is $Ax+by=C$.
The slope $m$ of the line is given by the formula $m=-\dfrac{A}{B}, B\ne0$.
The given equation is in standard form with $A=9$ and $B=-4$.
Thus, the slope of the line is:
$$m=-\dfrac{A}{B}=-\dfrac{9}{-4}=\dfrac{9}{4}$$