-k+l=2 \implies l=2+k\\
2k+l=-3 \\\\
2k+2+k=-3 \\
3k = -5 \\
k= \frac{-5}{3} \\
l = 2+\frac{-5}{3} = \frac{1}{3} \\\\
f(x)=\frac{-5}{3}x + \frac{1}{3}