John is moving from Portland to Sacramento, which is 600 miles away. He is traveling at an average speed of 55 miles per hour. Jon stops for gas after a couple of hours and wonders how much further he needs to go. If y represents distance from Sacramento and x represents time, which linear equation would indicate the amount of miles Jon still has to travel to Sacramento? a.) y equals 600 x minus 55
b.) y equals short dash 600 x plus 55
c.) y equals short dash 55 x plus 600
d.) y equals 55 x minus 600