Difference between revisions of "Geogebra/C3/Spreadsheet-View-Advanced/English-timed"

||Hello Everybody.

 

||Welcome to this geogebra tutorial on Spreadsheet view advanced.

||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.

||In this tutorial we will use the spreadsheet view to

||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

||Now to the geogebra window.

||To make the spreadsheet visible go to the view menu option and check the spreadsheet view option.

||Now let us create a slider here named xValue. We will leave the minimum and maximum default value and change the increment to 1.

||Lets move the xValue towards minimum value.

||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.

||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.

||And press close. Let us move the spreadsheet view so we can see columns A and B.

||Now lets select the record to spreadsheet option in the first tool the third option here.

||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.

||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.

||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.

||If the prediction is correct all the points traced will fall on the line that was input or the function that was input.

||To summarize,

||We made a slider 'xValue'. We drew a point A with coordinates (xValue, 3 xValue)

||We used the 'Record to Spreadsheet' option to record the X and Y coordinates of point A, for different xValues.

||We predicted an input function by studying the number patterns

||Now to the second part of the lesson. First lets remove the trace from point A.

||Lets add the y intercept parameter

||Create another slider and lets name it b, leaving the minimum and maximum default values and changing the increment to 1, and click apply.

||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

||Then right click on point A. Select object properties change the y coordinates to 3 xValue + b, hit tab on the keyboard.

||check the show trace on. Then move the spreadsheet view so you can see column C and D.

||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.

||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.

||From this data you can ask the students to understand the pattern and predict the function.

||Repeat this process for different b values. The predicted function can be input in the input bar.

||Since we already have f(x) i will use g(x)= 3 x + b the value of 'b' here is 2. And press enter.

||Now to summarize, we made another slider named b, altered point A coordinate to xValue and 3 xValue + b for the y coordinate.

||used the Record to Spreadsheet option to record the x and y coordinates of point A, for different 'xValue' and 'b' values.

||We predicted an input function f(x) = 3 x + b. here we just call the function g(x).

||The assignment consists of tracing a quadratic function by making sliders 'xValue' and 'a'

||Plot a point A with coordinates xValue for the x coordinate and a xValue^2 for the y coordinate.

||Use the Record to Spreadsheet option to record the x and y coordinates of point A, for different 'xValue' and 'a' values.

||We make another slider 'b'. Plot a point A with coordinates xValue, a xValue^2 + b xValue + 3 for the y coordinate.

||Use the Record to Spreadsheet option to record the x and y coordinates of a point A, for different 'a' and 'b' value combinations.

||predict and input the function f(x) = a x^2 + b x + 3.

||I have already created this geogebra file. In this case let us select the trace on, its already on.

||We will change the x value to minimum, and the use the record to spreadsheet, select point A and move the xValue slider.

||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.

||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.

||Thank you. This is bindu from IT for change, Benaluru, signing off. Enjoy exploring geogebra.