What’s the answer to this

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?

How do you determine whether a relationship represented as as graph is linear or nonlinear

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table