# Introduction to Graphs Class 8 Maths Formulas

For those looking for help on Introduction to Graphs Class 8 Math Concepts can find all of them here provided in a comprehensive manner. To make it easy for you we have jotted the Class 8 Introduction to Graphs Maths Formulae List all at one place. You can find Formulas for all the topics lying within the Introduction to Graphs Class 8 Introduction to Graphs in detail and get a good grip on them. Revise the entire concepts in a smart way taking help of the Maths Formulas for Class 8 Introduction to Graphs.

## Maths Formulas for Class 8 Introduction to Graphs

The List of Important Formulas for Class 8 Introduction to Graphs is provided on this page. We have everything covered right from basic to advanced concepts in Introduction to Graphs. Make the most out of the Maths Formulas for Class 8 prepared by subject experts and take your preparation to the next level. Access the Formula Sheet of Introduction to Graphs Class 8 covering numerous concepts and use them to solve your Problems effortlessly.

The x-coordinate of a point is its distance from y-axis.

The y-coordinate of a point is its distance from x-axis.

The coordinates of the origin are (0, 0).

The x-coordinate of every point on y-axis is zero.

The y-coordinate of every point on x-axis is zero.

A bar graph is used to show comparison among categories.

A pie graph is used to compare parts of a whole.

A histogram is a bar graph that shows data in intervals.

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

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

Fixing a point on the graph sheet we need, x-coordinate and y-coordinate.

The relation between dependent variable and independent variable is shown through a graph.

The purpose of the graph is to show numerical facts in visual form for their better and quick understanding. It is specially very useful when there is a trend or comparison to be shown.

**A Bar Graph**

It consists of two or more parallel vertical (or horizontal) bars (rectangles).

**A Pie Graph (or A Circle-Graph)**

It is used to compare parts of a whole. The circle represents the whole.

**A Histogram**

It is a bar graph showing data in intervals. It has adjacent bars over the intervals.

**Linear Graphs**

Location of a Point

For locating a point on the graph sheet, we need its x-coordinate and y-coordinate.

**Coordinates**

x-coordinate of a point reveals how much we have to move from origin O to right or left along the x-axis ; whereas y-coordinate of a point reveals how much we have to move above or below O along the y-axis.

**Some Applications**

In our daily life, we observe two quantities that are interrelated i.e., the change in one quantity is accompanied by a change in the other quantity.

For example more the number of days a labourer works, more the wages he gets. More the sugar we purchase, more the amount we have to pay.

In the first case, the number of days is called the independent variable (or control variable) and the wages is called the dependent variable.

Similarly, in the second case, the amount of sugar is the independent variable whereas the money paid is the dependent variable.

The relation between the independent and dependent variables can be shown by a graph.