chart.js demo

 lineChartData: {
        labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
        datasets: [
          {
            label: 'Weight track',
            backgroundColor: "transparent",
            data: [75, 75.6, 77.8, 78.1, 79.1, 80, 78.5],
            borderColor: "rgba(1, 116, 188, 0.50)",
            pointBackgroundColor: "rgba(171, 71, 188, 1)"
          }
        ]
      }