namespace WindowsFormsApplication4.Models
{
    public class Entry
    {
        public string Segment { get; set; }
        public int Time { get; set; }
        public double Speed { get; set; }
    }
}

chart1 = new Chart();

        chart1.DataSource = list;

        chart1.Series.Add("Speed").YValueMembers = "Speed";
        chart1.Series["Speed"].ChartType = SeriesChartType.Bar;
        chart1.Series["Speed"].XValueType = ChartValueType.Double;
        chart1.Series["Speed"].YValueType = ChartValueType.Double;