Pls help me solve 3-6

Aboat's value over time is given as the function f(x) and graphed below. use a(x) = 400(b)x + 0 as the parent function. which graph shows the boat's value increasing at a rate of 25% per year?

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

If 20% of a number is 35, what is 50% of that number?