Index Value Plot (46)

http://waterwatch.usgs.gov/index.php?r=us&m=real&w=plot
The Index Value Plot above shows average rainfall in the US from 1999 to 2012. Instead of starting at an abosolute number, an index value plot uses an index which is derived from a formula using the raw data given. Once you have the index, it can be used to create a visual graph of your data in an index value plot,

Accumulative line graph (45)

http://www.unc.edu/depts/econ/byrns_web/Economicae/Figures/Lorenz.htm
An accumulative line graph, also known as a Lorenz curve, is most commonly used in economics.The Lorenz curve shown above illustrates the cumulative share of the income earned by people from lowest to highest incomes.

Bilateral graph (44)

http://www.gallup.com/poll/106858/chinas-leadership-better-regarded-outside-west.aspx
Bilateral Graphs compare two or more sets of data in a visual graph, very similar to a bar graph, only with more bars. This particular Bilateral graph shows how certain countries approve or disapprove of the performance of leadership of China.

Triangular Plot (43)

http://www.ex-parrot.com/~chris/wwwitter/20050407-it_doesnt_matter_how_you_vote_either_way_your_planet_is_doomed.html
Triangular Plots are used to combine and compare three different variables. In this case we are looking at the three major political parties in the UK.

Parallel Coordinate Graph (42)

http://alumni.media.mit.edu/~tpminka/courses/36-350.2001/lectures/day38/
A Parallel Coordinate Graph is a common way of analyzing multi-variable data. In this particular graph we are comparing five different cars across several different characteristics.

Histogram (41)

http://en.wikipedia.org/wiki/Histogram
A histogram is a graphical representation showing a visual impression of the distribution of data. In the image pictured above, the histogram is showing the frequency of how tall, in feet, black cherry trees are.

Nominal Area Choropleth (40)

http://www.patriotnewsalert.com/ElectionMap2008.htm
Unlike a standard choropleth map, where color, or tint, changes as the variable changes. In the Nominal Area Choropleth the tint goes one way or the other, in the map above it goes red or blue. If Obama won the state it goes blue, the percentage is not shown, If McCain won the state, it goes red, but the map does not give what percentage of voters voted for McCain or Obama.