Solve the compound inequality -x/3< -4 or 5x + 11 -4

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

How do i do this? i don’t understand