Ti-84 Plus Graphing Calculator For Dummies, 2nd Edition
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Calculators are linked using the unit-to-unit link cable that came with the TI-84 Plus calculator. If you are no longer in possession of the cable, you can purchase one through the Texas Instruments online store.

The unit-to-unit link cable has an I/O plug on each end. This cable can be used to link a TI-83 to a TI-84. It can also be used to link two TI-84s. On the TI-83, it connects to the I/O port at the bottom of the calculator.

The unit-to-unit USB cable that came with your calculator has two mini-USB connectors. This cable can be used to connect TI-84 calculators using the mini-USB port at the top of each calculator.

If you get an error message when transferring files from one calculator to another, the most likely cause is that the unit-to-unit USB cable isn’t fully inserted into the port of one calculator.

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Jeff McCalla is a mathematics teacher at St. Mary's Episcopal School in Memphis, TN. He cofounded the TI-Nspire SuperUser group, and received the Presidential Award for Excellence in Science & Mathematics Teaching. C.C. Edwards is an educator who has presented numerous workshops on using TI calculators.

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