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8th Grade Math Vocabulary

Week 23

Dimensional Analysis

A process where units of measurement are included when computing an answer.

Dimensional Analysis

What this is all about is just conversion—converting one thing to another. This is something you will have occasion to do in real life.

Dimensional Analysis

Anything you measure will have a number with some sort of unit of measure. A unit could be miles, gallons, miles per second, peas per pod, or pizza slices per person.

Dimensional Analysis

You are having a Pizza Party!

Dimensional Analysis

How many Pizzas do you need to order if you are going to have 15 people at your party?

Dimensional Analysis

Rephrase what you want to know using the word "per," which means "divided by.

Dimensional Analysis

How many pizzas do I need to order per party? This is ultimately want I want to know.

Dimensional Analysis

There are 12 slices per Pizza.

1 pizza

12 slices

Dimensional Analysis

Each person can eat 4 slices.

We need 4 slices per person.

1 Person

4 Slices

Dimensional Analysis

There will be 15 people at the party!

There will be 15 people per 1 party!

__15_People

1 Party

Dimensional Analysis

_1_pizza_ 4 slices 15 persons = 60 = 5 pizzas

12 slices 1 person 1 party 12 1 party

Order 5 Pizzas

Density

A measure of how much mass is in a given space (density = mass/volume)

Density

The density of water is about 1 kilogram per liter (1 liter of water has a mass of 1kg).

Density

Anything that floats has a lower density.

A feather has a lower density than water.

Density

Anything that sinks is more dense.

A camera is more dense than water.

Scatter Plot

A graph that shows the general relationship, or correlation, between two sets of data.

Scatter Plot

This Scatter Plot shows the relationship between “years of experience” and “income”. “Income” is the money that you make.

Trend

Consistent change over time.

Trend

Trend

The trend for Population of Hispanics living in the US is that it is increasing a lot (48% between 2000 and 2011).

Linear Relationship

A relationship that has a straight-line graph.

Linear Relationship

Take a quiz on these math vocabulary words at www.RudolphAcademy.com