374

\left(-3{,}4\right)
y=-\frac{1}{2}x+3\ \frac{1}{2}
-\frac{1}{2}x-y+3\ \frac{1}{2}=0
\frac{\left|-\frac{1}{2}\cdot\left(-3\right)+\left(-1\right)\cdot4+3\ \frac{1}{2}\right|}{\sqrt{\left(-\frac{1}{2}\right)^2+\left(-1\right)^2}}=\frac{1}{\frac{\sqrt{5}}{2}}=\frac{2\sqrt{5}}{5}