Which marketing strategy helped Texas Instruments dominate the graphing calculator market and maintain premium pricing for decades despite minimal hardware changes?

Graphing calculators revolutionized mathematics education in the late 20th century, becoming essential tools for students worldwide. Despite their specialized nature, these devices became status symbols and commanded premium prices through innovative marketing strategies. This poll tests your knowledge about one of the most successful product marketing campaigns in educational technology history that changed how mathematics was taught and learned.

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Securing exclusive contracts with testing organizations like the College Board to require TI calculators for standardized tests
Creating a subscription-based model where students had to pay annual fees to keep their calculators functioning
Implementing planned obsolescence by releasing new models every year that were incompatible with previous textbooks
Offering steep educational discounts to individual students while charging premium prices to schools and institutions