Which of the following are functions

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Question: Which of the following are functions? The two problems, i.e., 1 & 3, are multi part relations consider all parts when determining whether or not these relations are functions. Explain your reason for 1, 2, & 3.

f(x) = 3 if x>2 otherwise f(x) = -2
f(x) = x + 5
f(x) = 7 if x>0 or f(x) = -7 if x<0 or f(x) = 7 or -7 if x = 0

Reference no: EM1314062

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