What types of irony are used when the duke says,
"they can turn it into a picnic if they want to - they
brought plenty provisions"?

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explanation:

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what’s your question?

. a function is a relation in which each input has only one output. in the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. x is not a function of y, because the input y = 3 has multiple outputs: x = 1 and x = 2.