A line chart displays the weekly temperature in degrees Celsius for each day from Monday to Sunday, with data points connected by a smooth curve and markers at each value. The visualization uses the ApexCharts library, instantiating an `ApexCharts` object with a `line` chart type, and maps the dataset’s `day` values to the x-axis categories and `temperature` values to the series data. Tooltips are configured to append the °C unit to each value, and the chart is rendered inside a centered container with a maximum width of 600 pixels.