Which calculator brand first introduced the now-ubiquitous graphing calculator to classrooms in 1985, revolutionizing how students visualized mathematical concepts?

Test your knowledge about the historical branding of calculators and computational tools that revolutionized mathematics education and practice. While these products may seem commonplace today, their introduction represented significant milestones in making mathematics more accessible. This trivia explores how certain brands became synonymous with mathematical calculation and education over the decades.

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