The first graphic calculator intended for commercial sale was the Casio fx-7000G released in 1985. The advent of the graphing calculator was a significant step forward in technology with respect to all the previous models of calculators. Until now, the calculators could only handle separate calculations at once, but Casio fx-7000G could perform a series of calculations based on formulas or functions entered by the user. In addition, can store calculation results in memory. Casio fx-7000G was also the first calculator which could be programmed by the user.
To graphing calculator not only kreślił point on the graph, but also to display them so the user can see them, he demanded a stronger display than those offered in previous versions. To fix this, Casio has integrated matrix 96×64 screen, allowing construction of diagrams, histograms, graphs, algebraic, regression line and normal distribution curves .
When Casio first introduced the graphing calculator, he created it with the design of the custom processor is based on the popular Z80, which was used to power the home desktop of the day. Because the computers of those times were relatively simple, graphing calculators, was able to perform many of the same features that made them essentially portable computers .
When Casio opened the door to market graphing calculators, soon after this came other companies. In 1987. HP has released the HP-28, which was the first calculator that enables the solution of equations symbolically . Was available in two models: the HP-28C and HP-28S. Both models had a hinged flap with a keyboard on the left alphabetical and standard layout keyboard research right. There was also a screen dot matrix LCD 137 × 32.
The HP-28C was the first graphical calculator, who owned a Computer Algebra System (CAS), and comes with 2KB of RAM. In 1988 was released the HP-28S, which had incredible capacity of 32 KB of RAM and processor Saturn, working with a frequency of 1 MHz, offering the same specifications as desktop computers, the company informed.
The choice of a graphing calculator
Graphing calculators you can get in only 25 $ or even 200$, it is therefore worth to choose the features you need and which you do not. This will prevent the option more than you need for a tool that can be used only for a semester or two.
Almost every student can use a graphing calculator that has a Natural display Math . So it can display equations and formulas in exactly the same way as you save them on a sheet of paper; that means fractions look like fractions, and you can use full-size characters. Thanks to this reading of the graphing calculator will be much easier, which is especially useful for people who have just started to use them.
CAS makes use of a graphing calculator is faster and more efficient. Instead of having to define a numeric value for each variable, you can just run the algebra symbolically. It’s an absolute necessity for complex calculations, which not only make life easier, but also allow using the calculator processor to solve equations with multiple unknown variables.
Only the most expensive models are available with pełnokolorowymi screens, and some are even touch screens. Composite screen will make it easier to navigate the menus and graphics are more readable. People load type heavily focused on math, of course, need to consider them, but for those who just take the minimum of mathematics and exact Sciences, it is better to choose a less expensive model without a color screen.
Chart 3D-this is another function useful in the case of certain classes. 3D graphics allows using the calculator for plotting functions of several variables the plane x, yiz, unlike standard graphs, which only determines the x and y planes. If you take only basic algebra and precalculus, it is rather a luxury than an important feature, while those who take the non-linear algebra and calculus, I consider it invaluable.
Two common questions about graphing calculators
One of the important issues parents and students about graphing calculators “Which classes use them?” Graphing calculators are an indispensable tool in many classrooms, science and math. This is by no means an exhaustive list , but the student is expected to use a graphing calculator in algebra classes at all levels; the geometry, the account przedwzrostowy and calculus, trigonometry, biology, physics, chemistry, business and Finance, and statistics.
Another common question is whether you can buy one with a battery or one that uses standard alkaline batteries . Although nowadays a lot of people prefer rechargeable devices, buy one that requires alkaline batteries, you can be the best choice for those who will use their graphing calculators for testing.
If a student accidentally forgot to charge your device before a big test, can not do anything and have or pass a test without your graphing calculator or run to the store to buy one that accepts alkaline. Even if they are charged, they are always in danger of death during a lesson or test. Models that get alkaline, always ready for use, provided that the student will have the habit to keep a few extra batteries in the bag all the time.