Answer:
[tex]y=-8[/tex]Step-by-step explanation:
Use the point-slope form of a linear function, which is represented by the following equation;
[tex]\begin{gathered} y-y_0=m(x-x_0) \\ where, \\ (x_0,y_0)\text{ is the given point} \\ m=\text{ slope} \end{gathered}[/tex]Therefore, if the line passes through the point (-8,-4) and has zero slope:
[tex]\begin{gathered} y+8=0(x+4) \\ y=-8 \end{gathered}[/tex]The line is horizontal therefore the line equation is y=-8.