What is the function rule represented by the following mapping diagram? y = - 5x + 1 y = x + 1 y = - 3x - 1 y = - 4x

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Mathematics

Kaya Bridges

12 January, 18:16

What is the function rule represented by the following mapping diagram? y = - 5x + 1 y = x + 1 y = - 3x - 1 y = - 4x

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Ann Scott · Answer 1

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.