1. The TI-84 calculator is a powerful tool for solving a wide range of math problems, including algebra, calculus, and statistics. 2. It can perform arithmetic operations, graph functions, solve equations, and calculate derivatives and integrals. 3. To use it effectively, familiarize yourself with its keypad, menus, and functions. 4. For example, to solve an equation, you can use the 'MATH' menu and select 'Solver'. 5. For graphing, enter the function in the 'Y=' menu and press 'GRAPH' to visualize it. 6. The TI-84 also supports statistical calculations and can store data for analysis. 7. Using a calculator like the TI-84 can save time and reduce errors in complex calculations, but understanding the underlying math concepts is essential. 8. Always double-check your inputs and results to ensure accuracy.