Which table represents a linear function?

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Can someone me with these two circle theorem questions asap?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?