Which relation is a function?
A. {(-5, 1), (4,9), (6, 10)}
B.{(0, 3), (0, 9), (12,-4)
C.{-2, 10), (-6, 10), (-2,3)}
D.{(5, 5), (5,9), (5, 15)}

A

Step-by-step explanation:

A function cannot have any repeating x-coordinates; therefore A is the correct answer.

the range is 19

step-by-step explanation:

the range is biggest number minus the smallest, so in this case it would be

41 - 22 = 19

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer