Mathematical+Reflections,+p+68+10-11

**September 5th 2010 ** **7H ** **Big Idea: ** Observation and description of changes in the world around us are the first steps in finding and learning about patterns. **Essential Question: ** What are some of the variables around us? **__Mathematical Reflection __** **1) Write a letter to a friend explaining how to use a graphing calculator to make graphs and tables. Use a specific example to illustrate your explanation. ** Dear Friend,   Hi, I am Maimuna Marium, a student in AISD. Do you know how to use a graphing calculator to make a graph and a table? If the answer is no, then let me explain:   1. Switch on the graphing calculator by pressing the ON button.   2. Press on the Y= key on the top left   3. Write a equation for Y1, so for example: Y1= X+2 (to type X, press the button next to ALPHA, once. 4. Press on the graph key on the top right. · If you put a X on Y2, then you can see two graphs in one coordinate. · If you want to make a table instead of a graph, then you just follow every instruction of making graph except for #4. Instead of pressing the graph key, press 2ND and then the graph key. **2) The number of tents the tour organizers need is ½ times the number of customers. **
 * M.M **

**a. ** ** Write an equation for a rule you can use to calculate the number of tents for any number of customers. ** Y1= X+8 ** b. Does your equation give you enough information to make a table and a graph? Why or why not? ** <span style="font-family: "Times New Roman","serif"; font-size: 14pt;"> ** 3. Think of a situation which you can make a graph and a table, but not an equation. ** <span style="font-family: "Times New Roman","serif"; font-size: 16pt;">I think it will make a table without an equation. <span style="font-family: "Times New Roman","serif"; font-size: 14pt;"> ** Think about your answers to these questions, discuss your ides with other students and your teacher, then write a summary of your findings in your journal. **

In this investigation, we mainly learned how to use the graphing calculator. We also learned how to make graphs and tables out of equations in a graphing calculator. We learned how to draw a graph by hand from an equation and also learned how to make an equation out of a table. I learned how to make an equation with variables and form them to match the given problem.