Which situation would best be modeled by the direct variation y = kx? The amount of money you make for working x hours at k dollars per hour y represents the length of an object in feet, x represents the length in yards, and k = 13 The total charge for k items selling for x dollars a piece, plus $10 for shipping A candle is 12 inches long, and y represents its length after burning k hours at a constant rate of x inches per hour