The average national utility price is $270. 48. Over a 6-month period, what is the average utility price in Dallas? How does this compare with the national average? A graph titled Dallas, Texas, has month on the x-axis and average utility price on the y-axis. For April, the cost was 283 dollars; May, 318 dollars; June, 315 dollars; July, 354 dollars; August, 356 dollars; September, 330 dollars. A. $1,956; higher than the national average b. $326; higher than the national average c. $163; lower than the national average d. $333; higher than the national average.