Find whether the given expression is a function or not

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Reference no: EM1317547

Find whether the given expression is a function or not.

Which of the following are functions? The last two problems, i.e., b & c, are multi part relations consider all parts when determining whether or not these relations are functions. Explain your reasoning for a, b, and c.

a. f(x) = x + 5

b. f(x) = 3 if x>2 otherwise f(x) = -2

c. f(x) = 7 if x>0 or f(x) = -7 if x<0 or f(x) = 7 or -7 if x = 0

Reference no: EM1317547

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