It depends on the parameters. In cases where the values on the x,y or x,z axis are of similar proportions use simple gridded graph paper and label clearly. Label what the reader is looking at and the units.
If there is a large change in one parameter vs the other, the logarithmic graph paper is best used. For example pressure as an airplane goes up vs Temperature.
No studies have been done - you should do this for a science project and get an A!
pig graph
the curve should be located in the center of the graph.
Usually factors that belong on a Y-axis coordinate on a graph.
Easy, just use your word processor. There should be a option for a graph, if not then get Open Office. http://www.openoffice.org/
At the top, usually in the middle or on the left.
line graph
A pie chart would be the best graph to show what percent of your class wears glasses. Each slice of the pie can represent a different percentage of the class, making it easy to visualize the distribution of glasses wearers in the class.
A science graft.
Table Graph
bar graph
The three kinds of graph is bar graph, line graph, and pie graph. bar graph is used to compare two or more things. A line graph is used to show changes over time. A pie graph is used to show proportions.