PLEASE HELP ME ANSWER PARTS D, E, and F!! URGENT PLS AND THANKS

Which of the following best describes the graph below? a. it is a function, but it is not one-to-one. b. it is a one-to-one function. c. it is not a function. d. it is a many-to-one function.

If the discriminant if a quadratic equation is 4 which statement describes the roots?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is