Can someone help answer the first two?

It takes a total of 6 hours to fill up an inground backyard pool using a standard house. a function can represent this situation to represent the amount of water in the pool until it is full a function of time the hose is running. determine the domain for the function

When only separate discreet points are graphed it is called?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)