Which function has a range limited to only negative numbers?

Can someone me and do the problem plz so i can understand it more better

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function