var Points = [
    [0, 2],
    [3, 3.65],
    [6, 2.36],
    [10, 6.38]
];

function coordinates( arg: number, points ) {
    let result:number = 0;
    for(let j = 0; j < points.length; j++){
        let k1:number = 1;
        let k2:number = 1;
        for(let i = 0; i < points.length; i++){
            if(j == i){
                k1 = k1 * 1;
                k2 = k2 * 1;
            }
            else{
                k1 = k1 * (arg - points[i][0] );
                k2 = k2 * (points[j][0] - points[i][0]);
            }
        }
        result =  result + points[j][1] * k1/k2;
    }
    return result;
};