342 • GRUBER’S COMPLETE GRE GUIDE 2014
Bar Graphs 704. The bar graph shows how information is compared by using broad lines, called bars, of varying lengths. Sometimes single lines are used as well. Bar graphs are good for showing a quick comparison of the information involved; however, the bars are difficult to read accurately unless the end of the bar falls exactly on one of the divisions of the scale. If the end of the bar falls between divisions of the scale, it is not easy to arrive at the precise figure represented by the bar. In bar graphs, the bars can run either vertically or horizontally. The sample bar graph following is a horizontal graph.
Preview - tusachduhoc.com
EXPENDITURES PER PUPIL—1990
New England
Great Lakes
Great Plains
Rocky Mountains
$430
$440
$450
$460
$470
$480
The individual bars in this kind of graph may carry a label within the bar, as in this example. The label may also appear alongside each bar. The scale used on the bars may appear along one axis, as in the example, or it may be noted somewhere on the face of the graph. Each numbered space on the x-axis (or horizontal axis) represents an expenditure of $10 per pupil. A wide variety of questions may be answered by a bar graph, such as: (1) Which area of the country spends least per pupil? Rocky Mountains. (2) How much does the New England area spend per pupil? $480. (3) How much less does the Great Plains spend per pupil than the Great Lakes? $464 2 447 5 $17/pupil. (4) How much more does New England spend on a pupil than the Rocky Mountain area? $480 2 433 5 $47/pupil.
GRE2014_P06.indd 342
3/8/13 1:20 PM