Proportion A The first thing you should know in this case is what the rate of change means. The rate of change in a linear equation is given by the slope of the line. For a linear equation, the rate of change is constant. So we have to: y = 9x The slope is: m = 9 Proportion B The slope of the line will be: m = (y2-y1) / (x2-x1) Substituting values: m = (57.5-34.5) / (5-3) m = 11.5 Answer: The rate of change in proportion A is 2.5 less than in proportion B.
