1.a)An engineer testing the transmitter for a new radio station measures the radiated power levels (/2 ) 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. (x-distance ranges from 100 to 400, y-power level)

Which regression model fits the data best? Why?

exponential regression - y=ab^x , a=333.05 , b=0.787 , r²= 0.8802

power regression - y=ax^b , a=2014.7 , b=-2.004 , r²=0.9997

1.b)Use the appropriate equation to determine the radiated power level at 500 m from the transmitter.

I really need help and very much appreciate it thank you!