The given table shows the number of minutes Jalen talks on his mobile phone and the cost of the phone calls. Jalen’s Mobile Phone Cost Number of minutes, x 150 220 250 275 Cost, y 7 point 5 0 dollars 11 point 0 0 dollars 12 point 5 0 dollars 13 point 7 5 dollars If the cost varies directly with the number of minutes Jalen talks on the phone, which equation represents the variation?