C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace chart
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        double a,b = 0;
        private void Form1_Load(object sender, EventArgs e)
        {
            timer1.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            a = a + 1;
            b = b + 3;
            timervaluee.Text=a.ToString();
            chart1.Series[0].Points.AddXY(a, b);
        }
    }
}