Which product design innovation first allowed graphing calculators to visualize 3D mathematical functions, revolutionizing how students could interact with complex mathematical concepts?

The design of mathematical tools and educational products has evolved significantly over the decades. From basic calculators to advanced software, product design in mathematics has transformed how students learn and professionals work. This trivia question explores a landmark product design decision that revolutionized how we interact with mathematical concepts.

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• Texas Instruments' TI-92 with 3D rotation capabilities (1995)
• HP-48GX with expanded memory architecture (1993)
• Casio's fx-9860G with Natural Display technology (2004)
• Sharp EL-9900 with split-screen functionality (1998)

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