Which relation is a function?

A. (8, –4), (8, 4), (6, –3), (6, 3), (0, 0)
B. (4, 7), (8, 5), (6, 4), (5, 3), (4, 2)
C. (0, 0), (1, 1), (2, 2), (3, 3), (4, 7)
D. (0, 0), (1, 0), (1, 1), (2, 1), (1, 2)

(x+3)(x+7)

step-by-step explanation:

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true

what is the your question?