Question

represent the pair of equation graphically x-2y-4. , 2x+4y-12=0

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Answer 1

Answer:

For two lines to be parallel,

a

2

a

1

=

b

2

b

1



=

c

2

c

1

-----equation(1)

where, a and b are coefficients of x and y and c is constant

Here, the lines are x+2y=4 and 2x+4y=12

As we can see that,

2

1

=

4

2



=

12

4

which is same as the condition of equation (1), hence given lines are parallel.

Answer 2

Answer:

for line be parallel.

a

2

b1