Answer:Linear equation is: C=16.5x+45Activation fee change would cost him less.Step-by-step explanation:you have the right rate: 16.50.and the right activation fee: 45.If they increase the activation fee by 50%, it will be 22.5+45 which equals 67.5. Increasing the slope (monthly charge) by 10% would mean 16.5*10% which is equal to 1.65. Add this to the original slope (because it is increasing), and you will see that the new slope would be 18.15.The two new equations would be C=18.15x+45 & C=16.5x+67.5Then, because x stands for months, we know that there are 24 months in two years.Plug in 24 for x in both equations, and the costs (in respective order to which I put them in), will be $480.60, and $463.50. Therefore, the activation fee change would be better for Bernice :) (also you made a mistake and you multiplied the inflated activation fee by 24 instead of the rate).