This graph represents a linear relationship between x and y. Which equation best represents the relationship shown in this graph?

y = 2x

y=−1/2x

y=−2x

y=1/2x

How to do this , and can some one explain

Solve the equation x/4 - 5= -8 -27 -12 -7 12

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?