The steepest line possible is a vertical line. Its slope is bigger than any
possible number you can think of, because it can change its height by
any amount in zero time. Its slope is 'undefined', meaning that there's
no number that can describe it. Some people would say it's 'infinity',
but that's not a number.
The best answer is 1.435 ·103 because while they both are really small for a rail road track that one is bigger. the final answer for that is 147.805mm.
