Help please !! What’s the answer ??

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?

Which representation has a constant of variation of -2.5

Ten times the square of a non-zero number is eqaul to ninety times the number