Products in the series have earned a strong reputation as graphing scientific calculators among both students and instructors involved in math education.
Once again, as Alberto pointed out, many of the comments that follow are opinions since there have not been rigorous studies of many aspects of graphing.
In 1985, Casio introduced the world's first graphing calculator, the fx-7000G, and in 2004 the company released the fx-82ES scientific calculator with textbook display that shows fractions and root functions as they appear in textbooks.