I need help answering this question.

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?

This question awards 100 ! i really don’t want to fail i will also mark you !

Atemperature of 1.64◦f corresponds to answer in units of ◦c.