What characteristic is true for all relations that are functions?
A. The graph of the relation passes the virtual line test
B. Every x-value in the relation has at least one y-value
C. Every y-value in the relation has exactly one x-value
D. The graph of the relation passes the horizontal line test

Miriam bought a bushel of apples from the apple orchard to bake apple pies for a bake sale. she started with 126 apples. after the first day of baking, she had 108 apples left. after the second day, she had 90 apples. after the third day, she had 72 apples left. if she continues this pattern, how many apples will she have left after 7 days of baking? apples