Cooking with proportions

Proportions, or equal ratios come up when we deal with food.

The following video demonstrates that.




If you would like more information about when you should set up a proportion please look here.
The homework tonight is to read pages 198 to 200 and do numbers 6 -25, 33-35.



The following poster describes when it would be appropriate to set up a proportion to solve a word problem.




Also, the following pdf was originally published by the Texas Education Agency. It is the April 2009 released TAKS test:



You may find more information about the TAKS test here: http://eigthgrademathmocity.wikispaces.com/TAKS+information

Scale factor is a proportional concept

If two figures are similar then there should be a scale factor that can be applied to one figure to get the sides of the other. The following video demonstrates how we can undertsand what similar figures really mean.

Your project is due tomorrow

Some of the projects that have been returned so far have been very well prepared. I am looking forward to the others that will be handed in tomorrow. If you need to email it to me you may find my email address on the school web site.

Today we discussed scale factor as it relates to similar figures.
To find the scale factor remember DO (dilation over the original) or NO (New over the Old)
You may find additional information about it here.



The notes from today are below.