Function Inspector Tool
The Function Inspector tool is available only in GeoGebra Classic. 
Activate the tool, then select the function to explore. A dialog window with two tabs, Interval and Points, appears.
Interval Tab
The Interval tab shows information about the function over the specified interval at the bottom, including the minimum value, maximum value, roots, integral, area, mean, and curve length.
Points Tab
The Points tab displays a table of values for the function. The corresponding points are displayed on the graph in the Graphics View but are not available as variables in the Algebra View.
The Points tab includes the following four buttons, each representing a different operation:

Show table of points
A table displaying ycoordinates corresponding to 9 xcoordinates is shown. The graph in the Graphics View displays these 9 points. The point corresponding to the xcoordinate in the middle row is highlighted in red on the graph. The xcoordinate in the middle of its column can be edited manually in the table or by dragging the red point in the Graphics View. Additionally, the steps that specify the interval between xvalues can be modified.
In the default table, the xcoordinate and ycoordinate are displayed. Use the + button in the upper right corner to add columns for the values of the first derivative, the second derivative, the difference from the previous column, and the curvature of the function corresponding to the xcoordinate. Use the x button to remove columns. Reorder columns by dragging their headers. 

Show x,y position lines
Display the projections of the red point’s xcoordinate and ycoordinate on the axes in the Graphics View. 
Show tangent line
Display the tangent line to the graph at the red point in the Graphics View. 
Show osculating circle
Display the osculating circle representing the radius of curvature at the red point on the graph in the Graphics View.
Select the icon in the upper right corner of the window to set the rounding of the displayed values to the desired number of decimal places or significant figures. 