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# Which of the following functions has a graph that is a line? f(x) = x f(x) = x 2 f(x) = |x|

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Correct answer:f(x)=xIn geometry, a straight line (no curves), and do not have thick. This extends in both directions without end, that is, infinitely. We need to find from the options of the graph of a line, let us recall that a function of a set a in a set is a relation that assigns to each element in the set exactly one element in the set . The set is the domain (also called the set of inputs) of the function and the set contains the interval (also called the set of outputs). Therefore, the correct option is, as illustrated in the following Figure.