Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset - DATA VISUALIZATION

I don’t understand why d[1,3] is an error and how to get one particular number from the array below. What is h2?

You’ll need to provide a link to the exercise in question and the code you’ve tried so that we have some context for debugging.

<body>
  <script>
    const positionData = [[1, 7, -4],[6, 3, 8],[2, 9, 3]]
    // Add your code below this line
    const output = d3.max(positionData, (d) => d[1,3]);  // Change this line

    // Add your code above this line

    d3.select("body")
      .append("h2")
      .text(output)
  </script>
</body>