Mathematical+Reflections,+p+17+0910

Arya B.
 * 30.8.09

Essential Question: What are some variables around us?** Observation and description of changes in the world around us are the first steps in finding and learning about patterns. 1. **In this investigation, you conducted a jumping jack experiment, collected the data in a table, and made a coordinate graph for the data. Your table and graph showed the relationship between the two variables. What were the two variables? How did one variable affect the other?**

Ans. The two variables were the number of jumping jacks done in two minutes and the speed it was done by. The time affected the other number of jumping jacks because as time increased the number of jumping jacks decreased because the person got tired over time.

2. **a. Name some of the things in the world around you that vary and can be counted or measured. Name two variables that you think are related.**

Ans. Some things in this world around us that vary and can be measured are chairs, books, tables, pencils, wood etc. Two variables that I think are related are the pencils and wood.


 * b. Explain how you could make a graph to show the relationship between the two related variables from part a. How would you decide which should be on the x-axis and which should be on the y-axis?**

Ans. You could make a graph to show the relationship between the two related variables by putting the independent variable (often time).


 * Think about your answers to these questions, discuss your ideas with other students and your teacher, and then write a summary of your findings in your journal.**

Variables are things that can change. Two variables in the experiment of ours were jumping jacks done in two minutes and the time it took to be done. These two variables affected each other. The time affected the number of jumping jacks done because as time increased the number of jumping jacks decreased. There are many things in this world around us that vary and can be counted or measured. Some of them are chairs, books, pencils, wood, tables, etc. Pencils, tables and wood are some things that can be related. We can make a graph to show the relationship between the related variables.