Let \( A=\{-1,0,1,2\} \) and \( B=\{2,3,4,5\} \). Find which of the following are functions from...

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Let \( A=\{-1,0,1,2\} \) and \( B=\{2,3,4,5\} \). Find which of the following are functions from \( A \) to \( B \). Give reason.
\[
f=\{(-1,2),(-1,3),(0,4),(1,5)\}
\]
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