Graphs of Simple Function

Here we will learn about the graphs of simple functions that is multiples of different numbers.

The example will help us to understand the graph of multiples of different numbers.

1. Draw the graph of the function y = 3x. 

2. From the graph, find the value of y, when 

(a) x = 4        

(b) x = 5

Solution: 

1. The given function is y = 3x. 
For some different values of x, the corresponding values of y are given below. 

On a graph paper plot the points O (0, 0), A (1, 3), B (2, 6) and C (3, 9) and join them successively to obtain the required graph.

2. Reading off from the graph of simple function:

(a) On the x-axis, take the point L at x = 4.

Draw LP ⊥ x-axis, meeting the graph at P.

Clearly, PL = 12 units.

Therefore, x = 4 ⇒ y = 12.

(b) On the x-axis, take the point M at x = 5.

Draw MQ ⊥ x-axis, meeting the graph at Q.

Clearly MQ = 15 units

Therefore, x = 5 ⇒ y = 15

Related Concepts:

● Coordinate Graph

● Ordered pair of a Coordinate System

● Plot Ordered Pairs

● Coordinates of a Point

● All Four Quadrants

● Signs of Coordinates

● Find the Coordinates of a Point

● Coordinates of a Point in a Plane

● Plot Points on Co-ordinate Graph

● Graph of Linear Equation

● Simultaneous Equations Graphically

● Graph of Perimeter vs. Length of the Side of a Square

● Graph of Area vs. Side of a Square

● Graph of Simple Interest vs. Number of Years

● Graph of Distance vs. Time

7th Grade Math Problems

8th Grade Math Practice

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