I can sway yet never fall, hold up equations, answering the call. What am I?

Category: Math · Difficulty: hard

Hint: Think about a reference line used in graphical representations.

Answer

An axis

Explanation

An axis serves as a reference line in graphs for plotting values, allowing for balance and orientation.

This is a hard math riddle — a tricky one that takes a little thought. The answer is An axis.

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