Which retail giant first introduced a graphing calculator that revolutionized math education by allowing students to visualize functions, leading to its adoption in standardized tests like the SAT?

Mathematical software and educational products undergo rigorous development processes before reaching consumers. Behind every graphing calculator, mathematical modeling software, or educational math game lies extensive research, testing, and refinement. This poll tests your knowledge about how major companies develop and market mathematical products that shape how we learn and apply mathematical concepts in education and professional settings.

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Texas Instruments (with the TI-83/84 series)
Casio (with the fx-7000G series)
Hewlett-Packard (with the HP-28 series)
Sharp (with the EL-9600 series)