Best graphing calculators for school If a conventional function or a scientific calculator can't perform well, a graphing calculator is probably the answer. It's a more sophisticated kind of calculator used for math, finance, statistics and more. However, it typically has a considerably higher price tag. Based on the features you want and features, you could be paying between $40 and over $100 to purchase one. But, as the saying says, you'll receive what you pay for. Unless you're able to time the purchase to coincide with a sales, it's likely a decent graphing calculator will cost you around $100. Texas Instruments TI-84 Plus CE The graphing calculator with high-definition display with color Amazon If you require a calculator that can perform well and produce an excellent image the TI84 CE is a good option. It's priced at $150, but you might often be able to find it on Amazon for just $105 or less. It's the TI-84 Plus CE has a HD, fu...