You said the cost is ₱600 plus ₱1,300 per day, so the correct function should be:> f(x) = 1300x + 600> (Not f(x) = 28x + 10)Now, to find the cost of renting the canoe for 3 days, plug in x = 3:> f(3) = 1300(3) + 600> f(3) = 3900 + 600 = ₱4,500Total renting cost for 3 days is ₱4,500.