What does it invertible mean in terms of functions?

• A function is invertible if it is a polynomial function.
• A function is invertible if it is continuous everywhere.
• A function is invertible if it has a maximum value.
• A function is invertible if it has a unique inverse function.

What is true about the graph of a one-to-one function?

• The graph of a one-to-one function is always increasing or decreasing

• The graph of a one-to-one function only increases.

• The graph of a one-to-one function can intersect itself.

• The graph of a one-to-one function is always a straight line.

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