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Introduction to Functions Mini-Lesson Review
A Function, when graphed, must pass the vertical line test. A Function is a rule where every input has only one output and every input has an output. A Function is a rule that assigns a single, unique output value to each input value. A Function describes a particular relationship between two quantities: an input quantity and an output quantity. A Function defines a relationship between two Quantities.

Introduction to Functions Mini-Lesson Review

All of the following are true statements. According to your Mini-Lesson, which of them is the more formal definition of a function?

A Function, when graphed, must pass the vertical line test.
A Function is a rule where every input has only one output and every input has an output.
A Function is a rule that assigns a single, unique output value to each input value.
A Function describes a particular relationship between two quantities: an input quantity and an output quantity.
A Function defines a relationship between two Quantities.