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<!DOCTYPE html>
<html>
<script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
<body>
<div id="myPlot" style="width:100%;max-width:700px"></div>
<script>
let exp1 = "x";
let exp2 = "1.5*x";
let exp3 = "1.5*x + 7";
// Generate values
const x1Values = [];
const x2Values = [];
const x3Values = [];
const y1Values = [];
const y2Values = [];
const y3Values = [];
for (let x = 0; x <= 10; x += 1) {
  x1Values.push(x);
  x2Values.push(x);
  x3Values.push(x);
  y1Values.push(eval(exp1));
  y2Values.push(eval(exp2));
  y3Values.push(eval(exp3));
}
// Define Data
const data = [
  {x: x1Values, y: y1Values, mode:"lines"},
  {x: x2Values, y: y2Values, mode:"lines"},
  {x: x3Values, y: y3Values, mode:"lines"}
];
//Define Layout
const layout = {title: "[y=" + exp1 + "]  [y=" + exp2 + "]  [y=" + exp3 + "]"};
// Display using Plotly
Plotly.newPlot("myPlot", data, layout);
</script>
</body>
</html>