linear least squares (typescript)

let sum_x: number = 0;
let sum_y: number = 0;
let sum_xy: number = 0;
let sum_xx: number = 0;
let count: number = 0;

/*
 * We'll use those variables for faster read/write access.
 */
let x: number = 0;
let y: number = 0;
let values_length: number = samples.length;

/*
* Nothing to do.
*/
if (values_length === 0) {
       return ;
}

/**
* in case we're dealing with single point selection
*/

if (values_length === 1) {
       return 1 ;
}
    
    
/*
         * Calculate the sum for each of the parts necessary.
         */
        /*
        for (let v: number = 0; v < values_length; v++) {
            x = samples[v].lab_cs;
            y = samples[v].mean;
            sum_x += x;
            sum_y += y;
            sum_xx += x * x;
            sum_xy += x * y;
            count++;
        }
        console.log(sum_y);
        
        /**
         * Calculate m and b for the formular: y = x * m + b
         */
        let m: number = (count * sum_xy - sum_x * sum_y) / (count * sum_xx - sum_x * sum_x);
        let b: number = (sum_y / count) - (m * sum_x) / count;

        /**
         * We will make the x and y result line now
         */
        let result_values_x: number[] = [];
        let result_values_y: number[] = [];

        for (let v: number = 0; v < values_length; v++) {
            x = samples[v].lab_cs;
            y = x * m + b;
            result_values_x.push(x);
            result_values_y.push(y);
        }
        console.log(result_values_y);
        // return [result_values_x, result_values_y];
        return ;