Which relations represent a function?

a.
(16, 14)
(14, −12 )
(9, 11)
(10, 14)

b.
(10, 8)
(7, 9 )
(9, 13)
(8, 5)

c.
(18, 24)
(16, 10 )
(5, 13)
(18, 14)

d.
(14, 12)
(10, 12 )
(−13, 7)
(11, 15)

b

Step-by-step explanation:to find a fuuction you have to make sure the y dont repeat itself

It is A, B and D

Step-by-step explanation:

I just took this test and gota 100%

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour