Free/points/ get them just helping

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

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

Which one ? is the answer and how to find this answer