7 Which of the following sets of points represents a function?
A {(1,4),(4,4),(0,5),(9,8) }
B {(3, 3), (3,4),(3,5),(3,6) }
C {(0,4),(5, -1),(0,5),(1,7)}
D {(3, 10),(6,1),(3,8),(-1,2)}

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.