please show work and explain how you got the answer

An engineer testing the transmitter for a new radio station measures the radiated power levels {MW/m2) at various distances in kilometers from the transmitter. From the data she constructs an exponential regression model and a power regression model as shown to the right. (xdistance ranges from 100 to 400, ypower level) a) which regression model fits the data best? Why? [1 marks] Exponential Regression y=abJlr a = 333.05 b = 0.787 r' = 0.8802 Power Regression b) Use the appropriate equation to determine the radiated power level at 500 m from the transmitter. [2 marks]