# 6.4.2 Tips to reduce Non-Linear Function to Linear Function

Tips:
(1)  The equation must have one constant (without x and y).
(2)  X and Y cannot have constant, but can have the variables (for example x and y).
(3)  m and c can only have the constant (for example a and b), cannot have the variables x and y.

Examples
(1)
X and Y cannot have constant, but can have the variables (for example x and y)

(2)
m and c can only have the constant (for example a and b), cannot have the variables x and y