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What is the inverse of the function f(x)=4x+8

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

On a piece of paper, graph y< x+1. then determine which answer matches the graph you drew.