Please help me I can’t figure them out

Asap 25 pts brainliest to right best/answer

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

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