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Articles & Books From C. C. Edwards
You and your trusty TI-84+ can ace math, together Graphing calculators are an essential tool in many high school and college math courses. TI-84 Plus CE Graphing Calculator For Dummies teaches you how to use these handy little machines with confidence, for basic math and far, far beyond. Packed with insider tips, common mistakes to avoid, and updates on the newest products available, this is the must-have reference to get the most out of your graphing calculator.
Video / Updated 11-19-2018
You can find the standard deviation of a data set in two ways with your TI-84 Graphing Calculator. First, have a look at the long lists to calculate the standard deviation from scratch on the TI-84 Graphing Calculator. Then see how to quickly find the standard deviation using one-variable stats. To help your understanding of standard deviation, this video explains what the abbreviations mean and where you can access these variables in your TI-84 Graphing Calculator.
Cheat Sheet / Updated 02-25-2022
Your TI-89 graphing calculator (along with the TI-89 Titanium, TI-92 Plus, and Voyage 200) help you graph and so much more. You can do higher math functions, include symbols, and format equations as well as make use of the basic calculator functions — and some odd ones, too!How to find higher math functions on the TI-89 graphing calculatorOf course, your TI-89 graphing calculator helps you with higher math functions — that’s part of the reason you bought it.
Cheat Sheet / Updated 01-21-2022
The TI-84 Plus C graphing calculator is one of the most popular calculators in the world. Find out the important keystrokes you need to know to use the TI-84 Plus, and learn the math functions and constants that the TI-84 Plus C makes available to you.Get to know the basics of graphing on your TI-84 Plus C, as well as how to use the calculator’s zoom commands and special menus.
Step by Step / Updated 03-27-2016
The Ti-84 Plus calculator can handle three decision commands (If, If . . . Then . . . End, and If . . . Then . . . Else . . . End). Here is how to use these commands in a program.The If commandThe structure of the If command appears in the first screen. If the condition following the If command is true, the program executes the command following the If statement (Command 1) and then moves on to the next command in the program (Command 2).
Step by Step / Updated 01-26-2022
Even the best calculating machine is only as good as its input. This list identifies ten common errors made when using the TI-84 Plus calculator. Wouldn’t it be great to avoid some of the common errors that normally plague students who are using calculators?Using [–] instead of [(-)] to indicate that a number is negative.
Article / Updated 03-26-2016
You can use the cable that came with your TI-84 Plus calculator to connect your calculator to your computer. The USB computer cable that came with your calculator is a USB-to-mini-USB cable.
Because the ends of this cable are of different sizes, it’s easy to figure out how to connect your calculator to your computer; the small end fits in the right slot on the top of your calculator and the other end plugs into one of your computer’s USB ports.
Article / Updated 03-26-2016
You'll use some keystrokes on your TI-84 Plus so often that it will save you time to memorize the keystroke sequences. Most students do this naturally (maybe they are used to memorizing complex cheat codes when playing video games.) Here is a list of the ten most common keystroke sequences that you will use on a TI-84 Plus in a math or science classroom.
Article / Updated 03-26-2016
Finding the maximum or minimum point on a graph on your TI-84 Plus calculator has many useful applications. For example, the maximum point on the graph of a profit function tells you not only the maximum profit (the y-coordinate), but also how many items (the x-coordinate) the company must manufacture to achieve this profit.
Article / Updated 03-26-2016
Regression modeling is the process of finding a function that approximates the relationship between the two variables in two data lists. The table shows the types of regression models the TI-84 Plus calculator can compute.
Types of Regression Models
TI-Command
Model Type
Equation
Med-Med
Median-median
y = ax + b
LinReg(ax+b)
Linear
y = ax + b
QuadReg
Quadratic
y = ax2 + bx + c
CubicReg
Cubic
y = ax3 + bx2 + cx + d
QuartReg
Quartic
y = ax4 + bx3 + cx2 + dx +
e
LinReg(a+bx)
Linear
y = a + bx
LnReg
Logarithmic
y = a + b*ln(x)
ExpReg
Exponential
y = abx
PwrReg
Power
y = axb
Logistic
Logistic
y = c/(1 + a*e-bx)
SinReg
Sinusoidal
y = a*sin(bx + c) + d
To compute a regression model for your two-variable data, follow these steps:
If necessary, turn on Diagnostics and put your calculator in Function mode.