TVH-72g Graphing Calculator by Tea Vui Huang is a low-cost introductory & disposable graphing calculator for the educational use of schools and students who may have difficulty, are unable or may not wish to acquire a stand-alone feature-laden graphing calculator.
The keys on mobile phones are generally not arranged in QWERTY format, which fits one of the requirements for using graphing calculators in exams. The TVH-72g has no memory functions and does not use the exam-forbidden Computer Algebra System (CAS). The TVH-72g graphing calculator plots graphs of quadratic equations and trigonometric functions.
TVH-72g Graphing Calculator 1.0