Am I right? Please help me check

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?

Find two numbers if their ratio is 4: 7 and their difference is 123.

Enter the amplitude of the function. f(x)=3cosx