The relationship between the number of miles traveled on a trip and the time spent traveling is shown in the graph to the right. a. Is the relationship between the two quantities a direct variation? Explain. b. If the relationship is a direct variation, find the constant of variation and explain what it means in this situation.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.