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11. Inverse, Exponential, & Logarithmic Functions
11. Inverse, Exponential, & Logarithmic Functions / Introduction to Inverse Functions / Problem 2
Problem 2

Which of these relations is NOT a function: A={(1,2),(2,3),(1,4)}A={\(\left\[\lbrace\)(1,2),(2,3),(1,4)\(\right\]\rbrace\)}, B={(0,1),(1,1),(2,1)}B={\(\left\[\lbrace\)(0,1),(1,1),(2,1)\(\right\]\rbrace\)}, C={(3,4),(4,5),(5,6)}C={\(\left\[\lbrace\)(3,4),(4,5),(5,6)\(\right\]\rbrace\)}, D={(7,8)}D=\(\left\]\lbrace{(7,8)}\[\right\]\rbrace\)?