To do this is point-slope form you need to know the two points and the slope, we already know the points but we don't know the slope. To find the slope, use the equation
, also known as rise/run. Points (-6,-8) and (2,-8) are (x1, y1) and (x2, y2).

So now we know that the slope is zero, so next just put the slope and first points all in the equation and then you have your answer.
y+8=0(x+6)
Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY!
- Cutiepatutie ☺❀❤