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# Which part of graph tells what the bar or lines represent?

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## Related Questions

###### Asked in Computers, Math and Arithmetic, Biology

### What part of a graph tells what the bars or lines repersent?

A graph can either have series legend or axis legends
An axis legend can, and should, be located at the edge of each
axis.
For example:
The legend for the x-axis should be on the right most side of
the x-axis.
The legend for the y-axis should be on top of the y-axis.
The legend is usually short and concise, eg. ppm/yr or simply x
or y
A series legend usually consist of colors associated with lines
in the graph, and can be combined with axis legends.

###### Asked in Math and Arithmetic, Science

### Which part of a graph tells what the bars or lines represent?

There are three parts to this.
1. Look at the labels of the axis of the graph. Generally these
will have a text which says "Time" "Weight" "Age" or something
similar and they are naturally ordered. In these cases it will also
have the units (seconds, pounds, years). In other cases the order
is arbitrary (cities, politicians, products).
2. Think about the graph as a sentence. The axis on the bottom
is the independent variable which causes something to change in the
dependent variable represented by the other axis. The purpose of
the graph can be described by filling these variables into a
sentence:
The (independent variable) affects (dependent variable) by
....
For example if the bottom axis is age and the other axis is
weight, the sentence might be The age of a person affect his or her
weight by...
3. The third part is the legend. It will tell you the
differences between the several lines, colors or symbols. Each one
might be a different gender, product or characteristic of the
relationship between the variables. This could mean that the graph
really represents several sentences. In the example above it might
be best to separate men and women into two different lines. So now
there are two sentences "The age of a woman affects her weight
by...." and "The age of a man affects his weight by....".
From there on you are on your own. Look at the line and fill in
the rest of the sentence. If the two lines in this example jumped
up from the ages 0 to 18, stayed level through the twenties and
gradually went up and then down peaking at 45, the whole sentence
might read "The age of a man affects his weight by rising quickly
in the pre-adult years, leveling during the twenties, increasing
into middle age and dropping off in the later years of life."
Thinking of the lines/symbols as representing a sentence may help
you to understand the purpose and interpretation of the graph.
There is also the title part of the graph which tells you what
the data is about.

###### Asked in Math and Arithmetic, Algebra, Calculus

### How does the graph of the cosine function differ from a graph of a sine function?

the graph of cos(x)=1 when x=0
the graph of sin(x)=0 when x=0.
But that only tells part of the story. The two graphs are out of
sync by pi/2 radians (or 90°; also referred to as 1/4 wavelength or
1/4 cycle). One cycle is 2*pi radians (the distance for the graph
to get back where it started and repeat itself.
The cosine graph is 'ahead' (leads) of the sine graph by
1/4 cycle. Or you can say that the sine graph lags the cosine graph
by 1/4 cycle.

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