Answer
$y-4=-\frac{3}{4}(x-2)$. See graph.
Work Step by Step
Step 1. Given point $P(2,4)$ and slope $m=-\frac{3}{4}$, we can write the point-slope form of the equation as $y-4=-\frac{3}{4}(x-2)$.
Step 2. We can plot the above line as shown in the figure. See graph.