1. Determine whether each table represents a linear function. If so, write the function.

graph A.
x y
———
-2 5.5
1 4.75
4 4
7 3.25

graph B
x y
———
0 5
2 13
4 21
8 3.25

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.