For this case, what you should know is that a linear function has a constant average rate of change, because its slope is constant. Table number two from left to right represents a linear function. The line is: y-yo = m (x-xo) Where The slope is: m = (0 - (- 5)) / (2-1) m = 5/1 m = 5 The line is: y-0 = 5 (x-2) Rewriting: y = 5x-10 Answer: Table two from left to right. The equation is: y = 5x-10