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 short dash 55 x plus 600 b.) y equals short dash 600 x plus 55 c.) y equals 55 x minus 600 d.) y equals 600 x minus 55