Which set of ordered pairs represents a relation that is a function? A. {(0, 1), (1, 2), (2,3), (2, 1), (1, 0)}
B.{(2, 1), (1, 2), (0, 1), (1, 0), (1,3)}
C.{(0, 1), (0, 2), (0, 3), (0, 4), (0,5)}
D. {(0,3), (2, 1), (4, 5), (6,5), (3, 1))

c represent s a relation that is a function

Step-by-step explanation:

all other choices have a reputition of numbers in the y coordinate

D

Step-by-step explanation:

A has (1, 2) and (1,0) and for functions for every input you need one output

B has (1,2) (1,3) (1,0) and same thing

C Has all of the inputs the same, so the input has multiple outputs which again is not a function

D has all inputs that have only one output

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation:

step-by-step explanation: