# Introduction to Graphs

## Graphs

Graphs are visual representations of data collected. They often helped us in showing the trend of the data

## Various type of Common Graphs

### Bar Graph

A bar graph is used to show comparison among categories

### Pie Chart

A circle graph shows the relationship between a whole and its part

### Histograms

A Histogram is a bar graph that shows data in intervals. It has adjacent bars over the intervals

### line graph

A line graph displays data that changes continuously over periods of time.

### linear graph.

A line graph which is a whole unbroken line is called a linear graph

## Solved Examples on Graphs

Draw the Line Graph for the following
a)
 Sales (crore) 10 15 20 15 25 Year 2013 2014 2015 2016 2017

b)

 Time 10 11 12 13 14 Temperature 250C 260C 300C 350C 400C

Solution
a)

b)

## Cartesian system

The system of fixing a point with the help of two measurements, vertical and horizontal is known as Cartesian system

Important points
1) The horizontal axis is called X-axis
2) The vertical axis is called the Y-axis
3) O is the origin
4) Any point is depicted by distance from both the axis
5) The horizontal distance is called the x-coordinate
6) The vertical distance is called the y -coordinate
Example

Find the coordinates of the each of the point in the given below figure
Solution
A( 4,5)
B(5,0)
C(3,3)
D( 1,2)
E(2,1)
F(5.5,0)
G( 2,0)