...isplayed when performing a statistical regression where the data used does not fit the model for that particular regression. The error indicates that either:
a) There is an answer and it is out of the range of the calculator.
b) There is no solution for the problem.
Please see the TI-84 Plus C ... https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34423
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