let's check then
[tex]\bf y = -3x+4~\hspace{7em} (3~,~-5)~~ \begin{cases} x = 3\\ y = -5 \end{cases}\implies ~\hfill \stackrel{y}{-5}~=~-3(\stackrel{x}{3})+4 \\\\\\ -5=-9+4\implies -5=-5\leftarrow \textit{is that true? yeap}\textit{ \large \checkmark}[/tex]