A person swims 5km/hr in stilled water, flow of river is 1km/hr. he started swimming from point A and returned to point B in 75 mintutes. how far is point B from A? a) 2.5km b)3km c) 4km d) 5km

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

3; 9 is 8 to -4

step-by-step explanation: