The 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. 50 $11. 00 $12. 50 $13. 75 If the cost varies directly with the number of minutes Jalen talks on the phone, which equation represents the variation? y = 0. 05 x y = 20 x y = 157. 5 x y = 1125 x.