A city's electricity consumption, E, in gigawatt-hours per year, is given by E= 0.17 p2 where p is the price in dollars per kilowatt-hour charged. (a) Is E a power function of p? If so, identify the exponent and the coefficient. If not, enter NA in both entry areas E is a power function of p. The exponent is 3 , and the coefficient is 0.17 (b) Use the algebraic structure of the function to check if E is an increasing or decreasing function. E is a decreasing function.