The last two challenges cover the basics of displaying data dynamically with D3 using the `data()` and `enter()` methods. These methods take a data set and, together with the `append()` method, create a new DOM element for each entry in the data set.
In the previous challenge, you created a new `h2` element for each item in the `dataset` array, but they all contained the same text, `New Title`. This is because you have not made use of the data that is bound to each of the `h2` elements.
The D3 `text()` method can take a string or a callback function as an argument:
`selection.text((d) => d)`
In the example above, the parameter `d` refers to a single entry in the dataset that a selection is bound to.
Using the current example as context, the first `h2` element is bound to 12, the second `h2` element is bound to 31, the third `h2` element is bound to 22, and so on.
Change the `text()` method so that each `h2` element displays the corresponding value from the `dataset` array with a single space and the string `USD`. For example, the first heading should be `12 USD`.
