What does the suffix - ist mean in the word optimist

use the headings to create an overview of the main points.

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conclusions made on the basis of unstated or stated evidence are called inferences

. 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.