Given data:
The first given point is (-2,8) .
The second given point is ( 5,8).
The equaion of the line passing through the given points is,
[tex]\begin{gathered} y-8=\frac{8-8}{5-(-2)}(x-(-2)) \\ y-8=\frac{0}{7}(x+2) \\ y=8 \end{gathered}[/tex]Thus, y=8 represents a horizontal line so, third option is correct.