Select data to make a graph in Numbers on iPhone
In Numbers, graphs are created using data from a table. To create any type of graph, you can select the data first, then create a graph that displays the data. When you change the data in the table, the graph updates automatically.
Select the data before creating your graph
Select the table cells with the data you want to use. If you want to add data from an entire row or column tap the table, then tap the number or letter for that row or column.
If the data in your table is categorised, you can also select a column to plot the results of summary row calculations.
Note: To chart individual data points in a categorised table, make sure the first cell you select is not in a summary row. If the selection includes a group that’s collapsed, only data from the visible groups is plotted.
Tap
at the bottom of the screen, then tap Create New Graph.Tap 2D, 3D or Interactive.
Swipe to see more style options for each type of graph.
Tap a graph to add it, then drag the graph to where you want it on the sheet.
To change whether rows or columns are plotted as a data series, tap the graph, tap Edit References (you might need to tap
to see Edit References), tap 
in the toolbar, then tap an option.Tap Done, then tap Done again.
If you add a 3D graph, you see
at its centre. Drag this control to adjust the graph’s orientation.
Select cells in a pivot table to create a pivot graph
When you create a pivot chart, you can plot different data (such as Grand Totals) based on the cells you select. The pivot graph below displays the values in the Total rows (Electric and Manual) in the pivot table.
Select a cell (such as a Total or Grand Total cell) that includes the values you want to plot.
Tap
at the bottom of the screen, then tap Create New Graph.Tap 2D, 3D or Interactive, then tap a chart.
Swipe to see more style options for each type of graph.
You can adjust the data reflected in the graph at any time. To learn how, see Modify graph data in Numbers on iPhone.