Which of the following sets of ordered pairs is a function? {(-2, 4), (-2, 3), (-2, 2), (-2, 1)}

{(6, 1), (7, 3), (4, 2), (6, 2)}

{(8, 1), (7, 0), (7, -1), (8, 2)}

{(1, 3), (2, 4), (-1, -3), (-2, -4)}

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

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.

What is 140 squared pleas me i am dumb