import type { RegressionInput, RegressionResult } from './types.js';
/**
 * Simple linear regression (least squares)
 *
 * @param input - Regression input with x and y data arrays
 * @returns Slope, intercept, R² and equation string
 * @throws RangeError if x or y is missing, if x and y lengths differ,
 *   if fewer than 2 data points are provided, or if all x values are identical
 */
export declare function regression(input: RegressionInput): RegressionResult;
//# sourceMappingURL=regression.d.ts.map