Determine which of the following relations represent a function.
select one:
a. {(-3, 0), (-3, 2), (-1, 0), (0, 4)}
b. {(-5, -12), (-3, -6), (-1, 0), (1, 6)}
c. {(-1, 0), (2, 2), (-5, 4), (-1, 4)}
d. {(-3, 0), (0, 2), (-1, 0), (0, 4)}

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.