Chapter 2 Section 3 Using Scientific Measurements Graphs & Tables: Key Features and Reading.

Chapter 2Section 3 Using Scientific Measurements

Graphs & Tables: Key Features and Reading

X axis: The line on a graph that runs horizontally (left-right) through zero.

Y axis: The line on a graph that runs vertically (up-down) through zero.

Review a bit….



Pie Chart - A special chart that uses "pie slices" to show relative sizes of data.A pie chart is a circular chart divided into sectors, each sector shows the relative size of each value

Pie Charts

Features and Example

http://www.teach-nology.com/worksheets/math/graph/grap7.pdf


Bar Graphs A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights.It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.

Key Features



Line Graphs Line Graph - A graph that shows information that is connected in some way (such as change over time)You can also show multiple lines

Key Features



Scatter Plot A graph of plotted points that show the relationship between two sets of data.The data is plotted on the graph as "Cartesian (x,y) Coordinates“

It is now easy to see that warmer weather leads to more sales, but the relationship is not perfect.

http://www.mathsisfun.com/data/cartesian-coordinates.html




You can also draw a "Line of Best Fit" (also called a "Trend Line") on your scatter plot.

Try to have the line as close as possible to all points, and as many points above the line as below.

Best Fit Straight line


Interpolation is where we find a value inside our set of data points.Here we use linear interpolation to estimate the sales at 21 °C.

Extrapolation is where we find a value outside our set of data points.Here we use linear extrapolation to estimate the sales at 29 °C (which is higher than any value we have).


Summary of What Type of Graph to Use



Direct Proportions

• Two quantities are directly proportional to each other if dividing one by the other gives a constant value.

•

• read as “y is proportional to x.”

• If one variable goes up, the other variable goes

up….or vice versa

Section 3 Using Scientific MeasurementsChapter 2

xy

Direct Proportion


Inverse Proportions

• Two quantities are inversely proportional to each other if their product is constant.

•

• read as “y is proportional to 1 divided by x.”• If one variable goes up and the other variable goes

down….and vice versa

yx

1


Inverse Proportion


Click below to watch the Visual Concept.

Visual Concept

Section 3 Using Scientific Measurements

Direct and Inverse Proportions

Chapter 2

http://my.hrw.com/hssc_2012/hmd_na_chem/nsmedia/visualconcepts/75036.htm


Time Lines

Shows information in Chronological order. Includes a title, date AND explanation


Tables

Used for recording and organizing informationNeeds title, labels with units and data

Chapter 2 Section 3 Using Scientific Measurements Graphs & Tables: Key Features and Reading.

Documents

Transcript of Chapter 2 Section 3 Using Scientific Measurements Graphs & Tables: Key Features and Reading.