More Lessons for NYSED Regents Exam

Math Worksheets

High School Math based on the topics required for the Regents Exam conducted by NYSED.

Linear Regression & Correlation Coefficient by Calculator

How to compute the linear regression equation, y=ax+b, the linear correlation coefficient, r, and the coefficient of determination, r^2, using the TI-84 calculator, including turning the diagnostics on.

The TI-84 can display an R-value when fitting a regression line (best fit line) to data. The R-value is a numerical way of determining how closely the regression line fits the plotted data. The closer the R-value is to +/-1, the better it fits the data.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.