TL;DR: The forever-useful Texas Instruments TI-84 Plus graphing calculator is on sale for $88 at Walmart, saving you $28.
Since the dawn of time (okay, 1990), high school and college algebra classes are known for requiring those damn graphing calculators.
Will you ever use y=mx + b in the real world? That's debatable.
Will you ever use the good grades you got from opting for a real graphing calculator over a free, crappy app? Definitely.
The Texas Instruments TI-84 Plus are notoriously pricey, but you can grab one on sale for $88 at Walmart with free delivery. (They were $149.99 when I was in school, so be thankful.) Unfortunately, the newer rose gold model is still $118. Read more...
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