Write an equation for the value of y in terms of x. Then solve the equation for x. I don't know what to do when there are 2 missing variables

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

Solve -.016x= -16. need solving this

Which of the following choices gives you a slope of 3?