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CONTENT

1. Revision of linear graph and drawing quadratic graph
2. Obtaining roots from a quadratic graph
3. Finding an equation from a given graph
4. Application of quadratic equation to real life situations

## Linear Graphs

Recall that any equation whose highest power of the unknown is 1 is a linear equation. To draw the graph of a linear equation, we need to

1. Make a table of value for the equation
2. Plot the graph of the linear equation

Example:

Draw the graph of $$y = x -1$$

Solution:

$$y = x -1$$

x −2 0 2
−1 −1 −1 −1
y −3 −1 1

Scale:  2cm to 1unit on both axes

Graph of $$y = x -1$$

To draw a quadratic graph, we need to also follow the same process of drawing linear graph

Example:

Draw the graph of $$y = x^2 + 2x + 1$$

Solution:

Since $$y = x^2 + 2x + 1$$, we shall now make a table for the values of x & y.

Lesson tags: General Mathematics Lesson Notes, General Mathematics Objective Questions, SS1 General Mathematics, SS1 General Mathematics Evaluation Questions, SS1 General Mathematics Evaluation Questions Second Term, SS1 General Mathematics Objective Questions, SS1 General Mathematics Objective Questions Second Term, SS1 General Mathematics Second Term
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