A phone company charges according to the formula (3) (4) (5) (6) C(n) = 31.15 + 0.14n where n is the number of minutes, and C(n) is the monthly phone charge in dollars. a) Which of the following statements correctly explains the significance of the y-intercept in the equation above? O A. For every minute you talk on the phone your monthly phone bill increases by 31.15 dollars. O B. The phone company charges 0.14 dollars per minute to use the phone. O C. The fixed monthly service charge is 31.15 dollars. O D. If you do not use your phone all month, your monthly phone bill will be 0.14 dollars. O E. All of the above O F. None of the above b) Which of the following statements correctly explains the significance of the slope in the equation above? O A. The phone company charges 0.14 dollars per minute to use the phone. O B. If you do not use your phone all month, your monthly phone bill will be 0.14 dollars. O C. For every minute you talk on the phone your monthly phone bill increases by 31.15 dollars. O D. The fixed monthly service charge is 31.15