Chart.js not working properly to draw lines when is only 1 bar
<p>I want to do this chart:</p>

<p><a href="https://i.stack.imgur.com/o81AC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/o81ACm.png" alt=""></a></p>

<p>As you can see the lines (<strong>Meta</strong> and <strong>Rango de aceptación</strong>) were drawed like a points. I believe this is because I only have one bar and in another charts I was made with 2 bars I get the lines drawed like a line. </p>

<p>This is the code, what I'm doing wrong?</p>

<pre><code>&lt;canvas id="myChart2016_5857751099b04" width="500" height="500" style="display: block; width: 500px; height: 500px;"&gt;&lt;/canvas&gt;
&lt;script style="text/javascript"&gt;
                var ctx2016_5857751099b04 = document.getElementById("myChart2016_5857751099b04");
                var myChart2016_5857751099b04 = new Chart(ctx2016_5857751099b04, {
                    type: 'bar',
                    data: {

            labels: ["Año 1"],
            datasets: [
                            {backgroundColor:'rgba(36, 143, 36,0)',borderColor:'rgba(75, 172, 198,1)',
                        type: 'line',
                        label: 'Meta',
                        data: [100],
                        options:  { tension:0.0, bezierCurve:false },borderWidth: 1,tension:0.25 },                         {backgroundColor:'rgba(51, 51, 26,0)',borderColor:'rgba(182, 87, 8,1)',
                        type: 'line',
                        label: 'Rango de aceptación ',
                        data: [90],
                        options:  { tension:0.0, bezierCurve:false },borderWidth: 1,tension:0.25 },                         {backgroundColor:['rgba(99, 33, 36 ,0.1)'],borderColor:['rgba(99, 33, 36, 1)'],
                        type: 'bar',
                        label: 'Porcentaje de proveedores evaluados satisfactoriamente ',
                        data: [100],
                        options:  { tension:0.0, bezierCurve:false },borderWidth: 1,tension:0.25 }          ]},
                options: {
                        tension:1,
                        scaleBeginAtZero: true,
                        scaleStartValue: 0,
                        scales: {
                            xAxes: [{
                                categorySpacing: 20,
                                gridLines: {
                                      color: "rgba(0, 0, 0, 0)",
                                  },
                            }],
                            yAxes: [{
                                categorySpacing: 20,
                                ticks: {
                                    beginAtZero:true
                                }
                            }]
                        }

                    }
                });
                &lt;/script&gt;
</code></pre>

<p>I tryed on <strong>Meta</strong> and <strong>Rango de aceptación</strong> data:</p>

<p><code>data: [100,100,100]</code> and <code>data: [90,90,90]</code></p>

<p>But the result is unexpected:</p>

<p>[<img src="https://i.stack.imgur.com/izC0u.png" alt="1]"></p>