What is Linear Law?
It is a tool which will allow you to transform non-straight line equation to straight line equation so that you can plot a straight line. Most of the time, the axis will consist of x and/or y
One of the techniques involving taking lg (log base 10) on both sides of the given equation.
Common Mistake! STOP
This is one of the common mistakes I have highlighted in Top 7 Commonly Made Mistakes in Logarithm
How To Counter This Mistake
Very simple. Just add in a bracket on the right hand side of the equation.
<br>=>lgy=lg(Ax^b)<br>=> lgy=lgA+blgx<br> "y=(Ax^b)<br> =>lgy=lg(Ax^b)<br> => lgy=lgA+lgx^b<br>")
Now, your y-axis will be lg y and x-axis will be lg x. Gradient = b and y-intercept = lg A
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It is important to know the difference between Sketch A Graph & Draw A Graph.
Sketch ==>
- On foolscap paper
- Best Representation of the graph
- Less time as it reflects only the general shape of the graph.
Draw ==>
- On graph paper
- Accurate representation of the graph
- More time needed as it usually involves more points on the graph
- Curve rule/french curve is usually required.
Example:
Sketch 
What I will do :
- Find x-intercept (i.e. set y = 0)
- Find y-intercept (i.e. set x = 0) y = 1
- Put the 2 points on the axes I have drawn on foolscap, join the 2 points, label the line.
Draw
- Set up a table of 3 values of x choosen randomly i.e x = -1 , 0, 1
- Find out values of y for each value of x by substituting into the equation of the line.
- Plot the points on a graph paper accurately.
- Join the 3 points, label the line.
Good in straight line? You might want to check out how you can draw Exponential Graph here even with NO Math knowledge.
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Hi,
I'm Ai Ling. I enjoy coaching students who have challenges with
understanding and scoring in 'O' Level A-Maths and E-Maths. 
