Find an equation of the line with the given slope and containing the given point. write the equation in slope-intercept form. 13. slope 3; (1, 2) 14. slope 4; (5, 1) 15. slope -2; (1, -3) 16. slope -4; (2, -4) 17. slope 1/2; (-6, 2) 18. slope 2/3; (-9, 4) 19. slope -9/10; through (-3, 0) 20. slope -1/5; through (4, -6)

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.