The equation between two points is given as:
[tex]y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)[/tex]Plugging the values of the points given we have:
[tex]\begin{gathered} y-4=\frac{4-4}{-6-6}(x-6) \\ y-4=\frac{0}{-12}(x-6) \\ y-4=0(x-6) \\ y-4=0 \\ y=4 \end{gathered}[/tex]Therefore the equation in standar form is:
[tex]y=4[/tex]