Mathematical+Reflections,+p+82+0910

S. B. K.   Math 7B May 9, 2010 **Big Idea ** Negative numbers help us to model many real world situations. Essential Question #5: How do I multiply and divide integers? Notes from Class: How to change an improper fraction to a mixed number. 20/6, 20÷6= 3 r.2 = 3 2/3  **Mathematical Reflections 5 **  If the coordinates are both negative or positive, the point will fall on the top right or bottom left quadrants. If the ‘x’ coordinate is positive and the ‘y’ coordinate is negative, the point will fall on the bottom right quadrant. If the ‘x’ coordinate is negative and the ‘y’ coordinate is positive, the point will fall on the top left quadrant. You look at the coordinates and the point on the graph to figure out which part of the graph makes sense. For example, if you are looking at a graph of profits for a successful company, you look at the coordinates and the point in the top right quadrant for the part of the graph that makes sense in the real problem. In order to see which quadrant a point will fall in by looking at its coordinate, you see if the ‘x’ and ‘y’ coordinates are positive or negative. Negative coordinates fall on the left and bottom quadrants and positive coordinates fall on the right and top coordinates. To figure out what part of a graph makes sense in the real problem situation, look at the coordinates you need for the problem and the point on the quadrant is the point that makes sense in the real problem situation.
 * 1. ****How can you tell which quadrant a point will fall in by looking at its coordinates? **
 * 2. **** You ****have looked at several problem situations in which you figured out how to make a table of data. You also learned that if you can write an equation to describe how variables are related, you can use a graphing calculator to graph the equation. How do you figure out what part of the graph makes sense in a real problem situation? Use an example to help explain. **
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 * [[image:math7c-2008:EJC_Square.png caption="EJC_Square.png"]] ||