Mathematical+Reflections,+p+82

AM (Ariba Mahmud)
=BIG IDEA: NEGATIVE NUMBERS HELP US TO MODEL MANY REAL WORLD SITUATIONS.= =Essential Questions: How do I put negative and positive numbers in order?= =How can I add integers?= =How do I find the difference between the integers?= =How do I multiply and divide integers?=

If both coordinates are positive, the point will fall in the 1st quadrant. If both coordinates are negative, the point will fall in the 3rd quadrant. If the y-axis coordinate is positive and the x-axis coordinate is negative, the point will fall in the 2nd quadrant. If the x-axis coordinate is positive and the y-axis coordinate is negative, the point will fall in the 4th quadrant.
 * **1) How can you tell which quadrant a point will fall in by looking at its coordinates?**

The line connecting the points is what makes sense in the real problem situation. For example, in 5.2 we had to figure out how much profit Jean made according to the number of tune-ups she does. The line shows how her profit increases.
 * 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 the variables are related, you can use a graphing calculator to graph the equation. How do you figure out what part of the entire graph actually makes sense in the real problem situation? Use an example to help explain.**


 * __Summary__**

In this investigation, we learned about the 4 quadrants of a graph, calculating a "break-even point" (when you cross the x-axis), and using the window settings on a calculator to make graphs. ||