GRAPH

Definition Of Graph

Statistics: A graph is a picture that represents data in an organized manner

Algebra: A graph is a line or curve drawn on a number line or coordinate plane by joining the points represented by certain ordered pairs

More About Graph:

It's a pictorial representation of the data
Graph is the best tool to understand the data in an easy way
A graph is drawn in a grid
A graph is drawn between X and Y axes, where X axis is a horizontal line while Y axis is a vertical line

Examples of Graph

The figure shown below is an example of a statistical graph, called the bar graph that shows the number of people visited a park in different years.

Video Examples: Graph!
 

Solved Example on Graph

Ques : Identify the graph of the equation whose slope is - 3 and y-intercept is 6.

Choices:

A. Graph 2
B. Graph 3
C. Graph 1
D. Graph 4

Correct Answer: C

Solution:

Step 1: The equation of the line with slope - 3 and y-intercept 6 is y = - 3x + 6 which is 3x + y - 6 = 0
Step 2: So, The graph for the equation is Graph 1.

Ques: 200 hundred students were asked to name their favorite color. The result is shown in the table. Which of following is correct bar graph for the data given?

Choices:

A. Graph 1
B. Graph 3
C. Graph 4
D. Graph 2

Correct Answer: A

Solution:

Step 1: Observe the each number in the data and corresponding height of the bars
Step 2: The graph 1 is the correct representation of the data.