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.

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