Mathematics, 16.04.2021 18:20 kathleendthomas

Which set of ordered pairs represents a function? A
{(0,1),(1,−1),(1,2),(2,1),(−1,3)}{( 0,1),(1,−1),(1,2),(2,1),(−1,3)}
B
{(−1,1),(0,−1),(1,1),(2,−11),(3,3)} {(−1,1),(0,−1),(1,1),(2,−11),(3,3)}
C
{(1,−2),(1,−1),(1,0),(1,2),(1,3)}{( 1,−2),(1,−1),(1,0),(1,2),(1,3)}
D
{(0,1),(−1,−1),(2,5),(−3,1),(−1,7)} {(0,1),(−1,−1),(2,5),(−3,1

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Which set of ordered pairs represents a function? A
{(0,1),(1,−1),(1,2),(2,1),(−1,3)}{( 0,1)...