Which company first introduced the graphing calculator that revolutionized mathematics education in the early 1990s, creating a new product category that remains standard in classrooms today?

The world of mathematics education has been transformed by various tools and technologies over the decades. One particularly influential innovation changed how students interact with mathematical concepts, making abstract ideas more tangible and accessible. This poll tests your knowledge about a pivotal moment in mathematics education technology that changed classrooms forever.

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Texas Instruments with the TI-81
Casio with the fx-7000G
Hewlett-Packard with the HP-28S
Sharp with the EL-5200