Dynamic text contains an element that refers to one of the objects used in the construction. Thus, the text adapts to changes of the object (e.g. new coordinates, area).[br][br]Select the [img]https://www.geogebra.org/wiki/uploads/thumb/1/14/Mode_text.svg/16px-Mode_text.svg.png[/img] [i]Text [/i]tool and click in the [img]https://wiki.geogebra.org/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View[/i]. Click on [i]Advanced[/i] and select tab [img]https://wiki.geogebra.org/uploads/thumb/4/4e/Geogebra-logo-elipse.svg/16px-Geogebra-logo-elipse.svg.png[/img] [i]Objects[/i]. From the list of available objects, select the object which value should be displayed in the [img]https://wiki.geogebra.org/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View.[br][br][/i][b]Hint:[/b] You may also add static parts to your text. The dynamic part of your text will change, if the construction is modified.

Create a dynamic figure that visualizes the solution of a system of linear equations.[br][b]Note:[/b] Such a dynamic figure can also be used to visualize... [br][list][*]the solution of a system of functions.[/*][*]an equation in one variable by entering each side of the equation as one of the two functions.[/*][/list]

[table][tr][td]1.[/td][td][icon]https://wiki.geogebra.org/uploads/thumb/4/40/Menu_view_algebra.svg/120px-Menu_view_algebra.svg.png[/icon][br][/td][td]Enter the linear equation [code]line_1: y = m_1 x + b_1[/code] into the[i] Input Bar[/i].[br][/td][/tr][tr][td][br][/td][td][br][/td][td][b]Hint:[/b] The input [code]line_1 [/code]gives you [i]line[sub]1[/sub][/i]. [br][/td][/tr][tr][td]2.[/td][td][br][/td][td][i]GeoGebra [/i]will automatically create sliders for the variables[i] m[sub]1[/sub][/i] and [i]b[/i][sub][i]1 [/i][/sub]when pressing [i]Enter[/i]. [br][/td][/tr][tr][td]3.[/td][td][icon]https://www.geogebra.org/wiki/uploads/thumb/3/34/Algebra_hidden.svg/32px-Algebra_hidden.svg.png[/icon][/td][td]Show the sliders in the [img]https://www.geogebra.org/wiki/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View[/i] by clicking on the disabled [i]Visibility [/i]buttons next to their entry in the [img]https://www.geogebra.org/wiki/uploads/thumb/4/40/Menu_view_algebra.svg/16px-Menu_view_algebra.svg.png[/img] [i]Algebra View[/i].[/td][/tr][tr][td]4.[/td][td][icon]https://wiki.geogebra.org/uploads/thumb/4/40/Menu_view_algebra.svg/120px-Menu_view_algebra.svg.png[/icon][/td][td]Repeat steps 1 to 3 for the equation of [code]line_2: y = m_2 x + b_2[/code].[/td][/tr][tr][td]5.[/td][td][img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/32px-Stylingbar_icon_graphics.svg.png[/img][/td][td]Use the [i]Style Bar[/i] to change the color of both lines and their sliders.[/td][/tr][/table]

[table][tr][td]6.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_text.png[/icon][/td][td]Use the [i]Text[/i] tool and create a dynamic text[i] [/i]by entering [code]Line 1:[br][/code] in the appearing dialog and selecting [i]line_1[/i] from the list of objects on tab [img]https://wiki.geogebra.org/uploads/thumb/4/4e/Geogebra-logo-elipse.svg/16px-Geogebra-logo-elipse.svg.png[/img] [i]Objects[/i] of the [i]Advanced [/i]section.[/td][/tr][tr][td]7.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_text.png[/icon][/td][td]Create a dynamic text with the static part [code]Line 2:[/code] and select [i]line_2[/i] from the list of objects on tab [img]https://wiki.geogebra.org/uploads/thumb/4/4e/Geogebra-logo-elipse.svg/16px-Geogebra-logo-elipse.svg.png[/img] [i]Objects [/i]of the [i]Advanced [/i]section.[/td][/tr][tr][td]8.[/td][td][img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/32px-Stylingbar_icon_graphics.svg.png[/img][/td][td]Use the [i]Style Bar[/i] to match the color of the texts with their corresponding lines.[/td][/tr][tr][td]9.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_intersect.png[/icon][/td][td]Construct the intersection point [i]A[/i] of both [i]line[sub]1[/sub][/i] and [i]line[sub]2[/sub][/i] by either using the [i]Intersect [/i]tool, or by entering the command [code]Intersect(line_1, line_2)[/code]into the[i] Input Bar[/i].[/td][/tr][tr][td]10.[/td][td][icon]https://wiki.geogebra.org/uploads/thumb/4/40/Menu_view_algebra.svg/120px-Menu_view_algebra.svg.png[/icon][/td][td]Enter [code]xcoordinate = x(A)[/code] into the [i]Input Bar[/i].[br][b]Hint:[/b] [i]x(A)[/i] gives you the [i]x-coordinate[/i] of the intersection point [i]A[/i].[/td][/tr][tr][td]11.[/td][td][icon]https://wiki.geogebra.org/uploads/thumb/4/40/Menu_view_algebra.svg/120px-Menu_view_algebra.svg.png[/icon][/td][td]Also, define [code]ycoordinate = y(A)[/code].[br][b]Hint:[/b] [i]y(A)[/i] gives you the [i]y-coordinate[/i] of the intersection point [i]A[/i].[/td][/tr][tr][td]12.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_text.png[/icon][/td][td]Create a dynamic text with the static part [code]Solution: x =[/code] and select [i]xcoordinate[/i] from the list of objects on tab [img]https://wiki.geogebra.org/uploads/thumb/4/4e/Geogebra-logo-elipse.svg/16px-Geogebra-logo-elipse.svg.png[/img] [i]Objects[/i].[/td][/tr][tr][td]13.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_text.png[/icon][/td][td]Create a dynamic text with the static part [code]y = [/code]and select [i]ycoordinate[/i] from the list of objects on tab [img]https://wiki.geogebra.org/uploads/thumb/4/4e/Geogebra-logo-elipse.svg/16px-Geogebra-logo-elipse.svg.png[/img] [i]Objects[/i].[/td][/tr][tr][td]14.[/td][td][img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/32px-Stylingbar_icon_graphics.svg.png[/img][/td][td]Fix the texts so they can’t be moved accidentally by selecting the texts and opening the [i]Style Bar[/i].[/td][/tr][/table]