You see the charts for the selected number and its available text values. For example, in a chart, you might see product names as text values that each have a corresponding manufacturing price in the form of a number.
Tap the chart for the selected number and required text value.
Tap to modify the chart.
In Numbers, Text, and Charts, select the values that you want.
Optionally, tap to filter the numbers and text values to use in the analysis.
Optionally, tap to add more than one text element to a bar chart.
Based on the data selected, you see the analysis in a chart that is appropriate for that data.