Mathematical+Reflections,+p+52

May 30 2009 CM **Essential Question**:How can technology help us explore linear patterns in the world? notes:none
 * Big Idea**: Many real world situations can be modeled and predicted using mathematics.

1. A: //Some advantages are that a graphing calculator is easy to use and u dont have to worry about using rulers or wasting paper. Also the graphing calculator can do perfect straight lines incase the person doesnt recognize a straight line when they do it themselves. Some disadvantages are that sometimes people dont know how to answer questions using a graphing calculator because they just don't know how to even use one, and sometimes people dont feel comfortable using a graphing calculator to answer questions about linear situations.//
 * Q: What are some advantages and disadvantages of using a graphing calculator to answer questions about linear situations?**

2. A://To find the y-intercept in a table you have to have all of the data of the two equations and then find when both y data has the same data for the same x data. To find the y-intercept in a graph you look where the lines, from each data, cross over eachother. To find the y-intercept in an equation you plug in a number for x and solve for y for both data and once you have reached a point where both equations add up to the same answer for y then that is your y-intercept.//
 * Q:Explain how to find the y-intercept of a linear relationship from a table, from a graph, and from an equation?**

3. Q:**Summarize what you know about the graph of a linear equation of the form y=mx+b.** A://This equation would look like a straight line on a graph it would be in the 1st quadrant most likely. Also when x is zero y will be a number above zero. Also there would be a pattern, in other words, x and y will go up consistantly.//

4. Q:**Check whether the point (-2, 13) is on the line y=5-4x by substituting the coordinates into the equation. Show and explain each step you take so that it is easy to see the order in which you did you calculations.** A: //You would first write down what the equation is and then rewrite the equation in and plug in what x is. Next you solve the 4 - 2 because you always solve multiplication first and then addition and subtraction. Then finally solve for x, 5-(-8) equals -13, in other words y equals -13. y=5-4x y=5-__4-2__ (plug in x) y=5-(-8) (solve multiplication first the addition and subtraction) y=-13 (and solve for y)//

//Some advantages of using a graphing calculator to answer questions about linear situations is that it is easy to use and you don't have to worry about using rulers or wasting paper. Also the graphing calculator can make perfect straight lines in case you can't recognize a straight line when you do it yourself. Some disadvantages are that the graphing calculator is difficult to use if you don't know how to use it. Also some people don't feel comfortable using a graphing calculator when answering a question about linear situations.To find the y-intercept in a table you have to have all of the data of the two equations and then find when both y data has the same data for the same x data. To find the y-intercept in a graph you look where the lines, from each data, cross over eachother. To find the y-intercept in an equation you plug in a number for x and solve for y for both data and once you have reached a point where both equations add up to the same answer for y then that is your y-intercept.//
 * __Summary__**


 * How do I complete our wiki assignment?**

Create a digital copy of your page first, then past it on the wiki page. If you are using another document (graph image, digital drawing) please don't make us download it to see it, upload the image to the page instead.

There are two purposes for the wiki. One, to give all students experience and practice using technology to display their ideas. Second, to assist those not present in class to give them a sense and concrete examples of what has happened in class on the day of the lesson. Keep these goals in mind as you check your work.Your page should include all of the following information, and anything else that you would like to improve the appearance of your page. Notes should summarize the class. Be sure to include the following:
 * Today's Date
 * Your Initials
 * Big Idea:
 * Essential Question:
 * Notes from Class:
 * Any new vocabulary and definition(s)
 * Any examples from the white board
 * Methods and strategies discussed in class
 * Your own questions
 * Problem set with **copied questions (in bold text)** and complete answers (in normal text), be sure to number your work. Show your work/thinking and include __at least one__ uploaded diagram or image.
 * [[image:math7c-2008:EJC_Square.png caption="EJC_Square.png"]] ||