What is the domain of the following parabola?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Six random samples were taken each year for three years. the table shows the inferred population for each type of fish for each year.

Which function is shown in the graph below?