desperately seeking the lost graph 

3rd year of secondary education. 


1. A FIRST GLANCE 

You
can form different graphs
in this window and the following windows by changing the parameter "g".
There aren't any reference numbers on these graphs as all we are interested in
at the moment is their shape. 


1. Change
the value for the parameter "g" and look at the
different graphs that appear on the electronic board. Copy them into your
notebook. 2. Which of the graphs in the window do you think corresponds to the following table of values about the amount of electricity used in a house? Copy this table into your notebook and draw the graph you think corresponds to it alongside the table.


3.Do
the same for the following table of values, which illustrates the distance
covered by a vehicle against the time:

2. STILL LOOKING 

As
was the case in the window above, different graphs
can be formed by changing the corresponding parameter
in the following window. 


4. Visualise
each of the graphs and draw them in your exercise book. 5. Copy the following table, which shows the number of bacteria produced in a culture against the time. Match it to one of the graphs you have just seen.


6. Repeat
the previous activity for the following table of values,
which shows the number of plants that germinate in a seedbed.

3.
THE SEARCH GOES ON 

In
the following window more complex graphs
than those seen up until now will appear. The parameter "g"
still represents the same thing. 




9. Make
up another table of values, which relates other magnitudes,
and that could be associated to the third graph that appears
in the window. 
4.
THE FINAL QUEST 


In
the following window there are some graphs
which are somewhat different to the other graphs we have seen so far. Change
the value of "g"
to see them one by one. 


10.Which of the three graphs in the window do you think corresponds to the following table of values, that shows the flight of a balloon? Copy the table and its corresponding graph into your exercise book.
11. Repeat the process for the following table of values, which shows the temperature of a substance being heated up:


12. Make
up a table of values with two related variables for each graph
which is not connected to any of the data given so far. Write them into your
exercise book along with their graphs that you haven't copied down yet. 



















Josep Mª Navarro Canut 


Spanish Ministry of Education. Year 2001 



Except where otherwise noted, this work is licensed under a Creative Common License