The data set is
0 means it reached end.
Let's graph
[tex]\\ \tt\longmapsto m=\dfrac{0+1}{-2-4}=\dfrac{1}{-6}[/tex]
Equation of line in point slope form
[tex]\\ \tt\longmapsto y+1=-1/6(x-4)[/tex]
[tex]\\ \tt\longmapsto -y-1=1/6(x-4)[/tex]
[tex]\\ \tt\longmapsto -6y-6=x-4[/tex]
[tex]\\ \tt\longmapsto x+6y+2=0[/tex]
Graph attached