About This Calculator
This calculator performs linear extrapolation based on a set of data points. By fitting a straight line using least squares regression, it predicts the y value for a given x outside the data range.
How It Works
- Enter at least two data points in (x, y) format, one per line.
- Enter the target x value where you want to estimate the corresponding y.
- Click "Calculate" to compute the regression line and predicted y value.
Slope =nΣ(xy) − ΣxΣynΣ(x²) − (Σx)²
Intercept =Σy − aΣxn
y = ax + b
Frequently Asked Questions
What is extrapolation?
Extrapolation estimates a value beyond the known data range using trends observed in the existing data.
How is the prediction calculated?
It uses linear regression to derive a best-fit line, then evaluates that line at the target x value.
Can I input more than two points?
Yes, the more points you provide, the better the accuracy of the regression.
What input format is supported?
Each line should contain one x,y pair separated by a comma, like1,2.