Quiah saved $200 every month that she worked. Her savings is recorded in the data table below. What equation would best describe Quiah's savings?

Answer:
(1, 500) (2, 700)
(700-500)/(2-1)
200/1= 200
y - 500 = 200(x - 1)
y - 500 = 200x - 200
y = 200x + 300