The graph below represents c, the amount a phone company charges, based on m, the number of minutes the customer uses each month. If there are a maximum of 44,640 minutes in a month, which equation best represents the phone company’s monthly charges? a graph entitled phone company charges has number of minutes on the x-axis and cost in dollars on the y-axis. The line has a positive slope and goes through (0, 15) and (40, 25). C = startfraction 15 over m endfraction, 0 less-than m less-than-or-equal-to 44,640 c = one-fourth m + 15, 0 less-than-or-equal-to m less-than-or-equal-to 44,640 c = 15 + startfraction 4 over m endfraction, 0 less-than m less-than-or-equal-to 44,640 c = 15 m + one-fourth, 0 less-than-or-equal-to m less-than-or-equal-to 44,640.