Asap ! the graph below represents the price of sending text messages using the services of a phone company. what is the constant of proportionality? a graph is shown. the values on the x axis are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. the values on the y axis are 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80. points are shown on ordered pairs 0, 0 and 2, 16 and 4, 32 and 6, 48 and 8, 64. these points are connected by a line. the label on the x axis is text messages sent. the label on the y axis is price in cents. a.8 b.14 c.16 d.48