面グラフになるので、折れ線グラフになるようオプションを試しに変えてみる

content/labs/visualization/2020-06-13-different-types-of-graphs.md

@@ -85,14 +85,6 @@ chart=true
         datasets: [{
             label: '# of Votes',
             data: [12, 19, 3, 5, 2, 3],
-            backgroundColor: [
-                'rgba(255, 99, 132, 0.2)',
-                'rgba(54, 162, 235, 0.2)',
-                'rgba(255, 206, 86, 0.2)',
-                'rgba(75, 192, 192, 0.2)',
-                'rgba(153, 102, 255, 0.2)',
-                'rgba(255, 159, 64, 0.2)'
-            ],
             borderColor: [
                 'rgba(255, 99, 132, 1)',
                 'rgba(54, 162, 235, 1)',