What is 14 over 15 divided by 10 over 21

Easy points boii. read it. ya. fresh

Chandler was a caretaker at the state zoo. he noticed that the number of animals adopted by the zoo increased at a constant rate every year since 2010. which of the following graphs shows the slowest rate at which the animals in the zoo were adopted?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2