Fr pts but pls try answering my question only the ones i asked tday

Given the graph below state whether or not the relation is a function, and give the domain and range.

What is the solution to the equation 9^(x+1) =27

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?