[list=1][*]In the input bar type [b]f(x)=x^2[/b] and press enter.[br][br][/*][*]Add a [b]New Point[/b], A,(2nd menu) on the curve.[br][br][/*][*]In the input bar type [b]a=x(A)[/b] and press enter.[br][br][/*][*]Add a [b]Tangent [/b](4th menu) to the curve at the point A. [br][br][/*][*]Measure the [b]Slope[/b] (8th menu) of the tangent. [br][br][/*][*]Enable [b]Graphics 2[/b] (View> Graphics 2).[br][br][/*][*]In the input bar type[b] (a,m) [/b]and press enter.[br][br][/*][*]Right-click point B and select [b]Trace On[/b].[br][/*][/list]