Mathematical+Reflections,+p.+15

__ TS 1/27/2009

Big idea: Many important practical and mathematical applications involve comparing quantities of one kind or another; it is important to know witch method to use and how we should use them. __  __  Investigation 1: Making Comparisons __  __  Essential Question:  __         __   //  What methods are there for comparing things? //__// **Mathematical Reflections unit 1** Page. 15 Ratio: In taste tests, people who preferred bolda cola outnumbered those who preferred cola Nola by a ratio of 3 to 2.

Differences: Students who prefer television outnumbered those who preferred radio by 20.

Fractions: 3/5 of cola drinkers prefer bolda cola to cola Nola.

Percents: 28% of people aged 12-17 go camping.

Scaling: The number of students who prefer watching television is 1.5 times the number who prefer the radio.

These questions will help you summarize what you have learned.

Ratio: Students prefer television to radio by a rati0 of 6 to 4. Differences: 5,713 more people surveyed prefer bolda cola to cola Nola. Fractions: 2/5 of the students surveyed prefer radio to 3/5 prefer T.V. Percents: In taste taste test 60% of the people surveyed prefer bolda cola. Scaling: In the camping data people ages 25-34 is almost 2 times the total amount of the people ages 12-17.
 * 1. Give another example for each statement below.**

A ratio comparison does not give you exact numbers but a difference comparison gives you the number left over. A ratio comparison also gives you a simplified number and no the full number so then you don't know the whole number.The difference comparison gives you a full number and the difference between them. //
 * 2. What information did you get from a ratio comparison that you do not get from a difference comparison.**