I am using line chart from http://www.chartjs.org/

As you can see max value (1
This is for Charts.js 2.0:
The reason some of these are not working is because you should declare your options when you create your chart like so:
$(function () {
var ctxLine = document.getElementById("myLineChart");
var myLineChart = new Chart(ctxLine, {
type: 'line',
data: dataLine,
options: {
scales: {
yAxes: [{
ticks: {
min: 0,
beginAtZero: true
}
}]
}
}
});
})
Documentation for this is here: http://www.chartjs.org/docs/#scales