National Center for Educational Statistics Graphing Website: http://nces.ed.gov/nceskids/

Data can be displayed in many ways, for example:

- Line Graphs
- Pie Charts
- Bar Graphs

depending on one another. The numbers along a side of the line graph are called the scale. The

horizontal scale is called the x axis and the vertical is called the y axis.

The weight scale runs vertically, while the time scale is on the horizontal axis. Following the gridlines up

from the beginning of the years, we see that John's weight was 68 kg in 1991, 70 kg in 1992, 74 kg in

1993, 74 kg in 1994, and 73 kg in 1995. Examining the graph also tells us that John's weight increased

during 1991 and 1995, stayed the same during 1991, and fell during 1994.

Pie charts are used to display the sizes of parts that make up some whole (percentages or fractions of one).

each bar or category. The numbers along a side of the bar graph are called the scale. The scale numbers can

be on the y axis (vertical) or the x axis (horizontal) depending on how the data are presented. The two

examples below show horizontal bars and the scales are on the x axis in each graph.

that 52 kg of apples were sold, 40 kg of oranges were sold, and 8 kg of star fruit were sold.

vertical axis, rather than just 1. The bar chart below shows the weight in kilograms of some fruit sold on two

different days by a local market. This lets us compare the sales of each fruit over a 2 day period, not just the

sales of one fruit compared to another. We can see that the sales of star fruit and apples stayed most nearly

the same. The sales of oranges increased from day 1 to day 2 by 10 kilograms. The same amount of apples

and oranges was sold on the second day.

The pie chart shows the

ingredients used to make a

sausage and mushroom

pizza.

The fraction of each

ingredient by weight is

shown in the pie chart.

- Half of the pizza's

weight comes from

the crust. - The mushrooms

make up the smallest

amount of the pizza by

weight, since the slice

corresponding to the

mushrooms is

smallest.

The points which are

used to connect

together to form a line

include the year and

the weight for that

year. For eample: in

1991 John weighed

68 kilograms (kg).

The x value is 1991

and the y value is 68

kg. These two values

can be written as

(1991,68). It is where

the 1991 value is 68

kg that a point is

placed. Connecting

all the point together

results in the line

graph.

used to connect

together to form a line

include the year and

the weight for that

year. For eample: in

1991 John weighed

68 kilograms (kg).

The x value is 1991

and the y value is 68

kg. These two values

can be written as

(1991,68). It is where

the 1991 value is 68

kg that a point is

placed. Connecting

all the point together

results in the line

graph.

Grant High School