5.2+Making+Tables+on+a+Calculator++0910

03/10/2009 S.B

are the first steps in finding and learning about patterns.
 * The Big Idea:**Observation and description of changes in the world around us


 * Essential Questions:** How can a graphing calculator help me to discover relationships between variables?

2.Using the table key to make a table on the graphing calculator.
 * Notes from class:** **Strategy discussed in class:** 1.Using the alpha and 2nd key on the graphing calculator.


 * New vocabulary and words:** alpha.

2.Do the lines on the graph go on forever?
 * Questions:** 1.How does graphing calculators make graphs so fast?


 * Examples from white boared:** press the y= key to put the equation for the graph in.


 * Problem 5.2**

I did this on an online calculator
 * A. 1. Use your calculator to make a table for the equation y=3x.**


 * 2. Copy part of the calculator's table onto your paper.**
 * X || Y ||
 * 0 || 0 ||
 * 1 || 3 ||
 * 2 ||~ 6 ||
 * 3 || 9 ||
 * 4 || 12 ||
 * 5 || 15 ||
 * 6 || 18 ||

According to the table, if x is 5, y would be 15.
 * 3. Use your table to find y if x=5.**

I did this on an online calculator.
 * B.1. Use your calculator to make a table for the equation y=0.5x+2.**

According to the table, if x is 5 then y is 4.5.
 * 2. Copy part of the calculator's table onto your paper.**
 * X || Y ||
 * 0 || 2 ||
 * 1 || 2.5 ||
 * 2 || 3 ||
 * 3 || 3.5 ||
 * 4 || 4 ||
 * 5 || 4.5 ||
 * 6 || 5 ||
 * 3. Use your table to find y if x=5.**


 * Problem 5.2 Follow Up

1.Use your calculator to make a graph for the equation y=3x. Describe the graph.** The line in the graph is going straight across the graph in a straight line. It goes through the zero point.

The line is going straight across from (-10, 10) to (10, 7.5). It is a straight line. It is going across the whole graph.
 * 2.Use your calculator to make a graph for the equation y=0.5x+2. Describe the graph.**

The similarities of the graphs are that they are both straight lines. And they go across the graph. But the differences of the graphs is that they have diffrent coordinate pairs. Plus, they don't go parellel to each other.
 * 3. how do the graphs for questions 1 and 2 compare?**

You can make the graph by first getting the data. You can replace each variable with a number. Then you can solve the equation to figure out what the variable y would be. You would keep repeating that process until you have enough data to make the graph. To make the graph, you would put 4 diffrent coordinate graphs together. 2 for negative numbers and 2 for positive numbers. They you would plot the data you got earlier on the graph by looking at the coordinate pairs.
 * 4.How would you make a graph for the equations y=3x and y=0.5 + 2 without a graphing calculator.**