Geogebra/C3/Spreadsheet-View-Advanced/English-timed

VISUAL CUE	NARRATION
00:00	Hello Everybody.
00:01	Welcome to this geogebra tutorial on Spreadsheet view advanced.
00:05	If this is the first time you are using spreadsheets for geogebra please see the spoken tutorial web site for the spreadsheet view basic tutorial.
00:15	In this tutorial we will use the spreadsheet view to
00:19	Record the X and Y coordinates of a point, traced along the function by using a slider.
00:24	Use the data to recognize number patterns and make predictions about a function graph.
00:29	To get started with geogebra I am using the new linux operating system Ubuntu version 10.04 LTS, and the geogebra version 3.2.40
00:40	Now to the geogebra window.
00:43	To make the spreadsheet visible go to the view menu option and check the spreadsheet view option.
00:52	Now let us create a slider here named xValue. We will leave the minimum and maximum default value and change the increment to 1.
01:07	Lets move the xValue towards minimum value.
01:12	Plot a point A. Change the coordinates of point A by right clicking on the point and selecting object properties, to xValue for the X coordinate and 3 times xValue for the Y coordinate.
01:36	Here we are setting the slope of the line that will be traced by this point to 3. Hit tab on the keyboard, also select the show trace on.
01:50	And press close. Let us move the spreadsheet view so we can see columns A and B.
02:02	Now lets select the record to spreadsheet option in the first tool the third option here.
02:10	Select point A. If it is not visible from the drawing pad please select it from the algebra view. And then move the slider xValue from minimum to maximum.
02:23	Notice the X coordinate of point A is traced in column A of the spreadsheet, and the Y coordinate of point A in column B.
02:34	Once this lesson is prepared you can ask students to predict the function by seeing the visual trace or the data in the spreadsheet view.
02:44	The predicted function can be input in the input bar as f(x) = 3 x. For times in geogebra we can use the space, and press enter.
03:05	If the prediction is correct all the points traced will fall on the line that was input or the function that was input.
03:15	To summarize,
03:18	We made a slider 'xValue'. We drew a point A with coordinates (xValue, 3 xValue)
03:27	We used the 'Record to Spreadsheet' option to record the X and Y coordinates of point A, for different xValues.
03:34	We predicted an input function by studying the number patterns
03:40	Now to the second part of the lesson. First lets remove the trace from point A.
03:53	Lets add the y intercept parameter
03:56	Create another slider and lets name it b, leaving the minimum and maximum default values and changing the increment to 1, and click apply.
04:10	Next we will move the value of b, use the move tool and move the value of b to 2, change xValue towards minimum value
04:24	Then right click on point A. Select object properties change the y coordinates to 3 xValue + b, hit tab on the keyboard.
04:40	check the show trace on. Then move the spreadsheet view so you can see column C and D.
04:50	Place your cursor on cell C1, again use the record to spreadsheet option. First select point A thats what you want to trace and then move the xValue from minimum to maximum.
05:06	You can see that the x coordinate of point A is traced in column C of the spreadsheet and y coordinate of point A in column D.
05:17	From this data you can ask the students to understand the pattern and predict the function.
05:22	Repeat this process for different b values. The predicted function can be input in the input bar.
05:29	Since we already have f(x) i will use g(x)= 3 x + b the value of 'b' here is 2. And press enter.
05:51	Now to summarize, we made another slider named b, altered point A coordinate to xValue and 3 xValue + b for the y coordinate.
06:02	used the Record to Spreadsheet option to record the x and y coordinates of point A, for different 'xValue' and 'b' values.
06:11	We predicted an input function f(x) = 3 x + b. here we just call the function g(x).
06:23	Now to the assignment.
06:25	The assignment consists of tracing a quadratic function by making sliders 'xValue' and 'a'
06:33	Plot a point A with coordinates xValue for the x coordinate and a xValue^2 for the y coordinate.
06:43	Use the Record to Spreadsheet option to record the x and y coordinates of point A, for different 'xValue' and 'a' values.
06:51	And to predict and input the function f(x)= a x^2. To continue with the assignment, we will be tracing a quadratic function a x^2 + bx + 3.
07:05	We make another slider 'b'. Plot a point A with coordinates xValue, a xValue^2 + b xValue + 3 for the y coordinate.
07:18	Use the Record to Spreadsheet option to record the x and y coordinates of a point A, for different 'a' and 'b' value combinations.
07:26	predict and input the function f(x) = a x^2 + b x + 3.
07:32	I have already created this geogebra file. In this case let us select the trace on, its already on.
07:43	We will change the x value to minimum, and the use the record to spreadsheet, select point A and move the xValue slider.
08:05	We can input the predicted function to f(x) = 2 x^2 + 2 x + 3 is what i have used to set the constant value as.
08:28	Notice the traces along this parabola.
08:36	Watch the video available at this web site, it summarizes the spoken tutorial project. If you do not have good bandwidth, you can download and watch it.
08:47	The spoken tutorial project team conducts workshops using spoken tutorials, gives certificates to those who pass an online test. For more details please contact them at this e-mail address.
09:02	Spoken Tutorial Project is a part of the talk to a teacher project. It is supported by the National Mission on Education through ICT, MHRD, Government of India. More information is available at this web site.
09:16	Thank you. This is bindu from IT for change, Benaluru, signing off. Enjoy exploring geogebra.

Contributors and Content Editors

Minal, PoojaMoolya, Pratik kamble, Sandhya.np14