Final answer:
The TI-84 Plus is a suitable calculator for graphing inequalities and equations with advanced features and ease of use. It is widely recommended for high school mathematics courses. Accurate input is crucial for reliable calculator results.
Step-by-step explanation:
Among the calculators listed, the TI-84 Plus is a good calculator that provides functionalities for graphing inequalities and equations. The TI-84 Plus can graph inequality symbols and give you their coordinates. This is an enhanced version of the earlier TI-83 and TI-83+ models, which are also capable of such calculations, as indicated by the reference material. However, the TI-84 Plus offers more advanced features and ease of use for these kinds of mathematical operations. While other calculators like the Casio FX-9750GII, HP Prime Graphing Calculator, and Sharp EL-W516XBSL may also have similar capabilities, the TI-84 Plus is specifically recommended for its step-by-step instructions on graphing functions and calculating best-fit lines, as well as solving problems involving outliers and using chi-square distributions. Its instructions are often included in textbooks, making it a popular choice in high school mathematics courses. Calculators are very helpful tools in any mathematical context, but it is essential to input the numbers accurately, as the calculator can only provide results based on what is entered into it.