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2. Linear Equation in Two Variables
Defining the Linear equation
A liner equation is an algebraic expression
in which each term is either a constant
or
the product of a constant
and a first power of a variable.
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3. Linear Equation in Two Variables
Defining the Linear equation
 A linear equation shows the equality of
two expressions.
2x+3=5x
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4. Linear Equation in Two Variables
Defining the Linear equation
 A linear equation can have number of variables
but the degree of each variable can not be other
than 1.
2x+3y=1
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5. Linear Equation in Two Variables
Defining the Linear equation
A linear equation in one variable is a simple
equation showing relation between two
expressions
Ex. 3x = 9
It shows that three time of x
is equal to 9.
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6. Linear Equation in Two Variables
Defining the Linear equation
Some more examples of linear equations in one
variable are:
4 = x/2
x = -1
2x +7 = 0
 7x/2 = 14
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7. Linear Equation in Two Variables
Dependant variable
A linear equation in two variables gives a
relationship between
two variables such that
the value of one of the variable
depends on the value of
the other variable.
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8. Linear Equation in Two Variables
Dependant variable
In a linear equation in x and y,
let x is the independent variable
and y depends on it.
Then y is said to be dependent
variable.
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9. Linear Equation in Two Variables
Dependant variable
Ex.
Let a car is running at a constant speed
of 25 km/hr.
As we know that the distance covered
by car is proportional to the time
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10. The equation is:
Distance (d)
= speed x time
so that,
D = 25 x t
Here t is independent variable
and distance is dependant variable.
Linear Equation in Two Variables
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