Can all linear functions be modeled by an arithmetic sequence?

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown below. fiona guesses that the coin is likely to land in the blue area. which explains whether or not fiona is correct and why?

Aline that intersects one of two parallel lines intersects the other also always sometimes never

What multiplys to be 1 but adds up to be 4