Graphically the pair of line are quations7x - y =5 and 28 x - 4y = 11 represents two lines which are : (a) Intersecting at one point (b) intersecting at two points ( Coincident (d) parallel
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Answer:
Graphically, the pair of equations 7x - y = 5 and 21x - 3y = 10 represent two lines which are parallel lines.
Explanation:
The first equation is 7x - y = 5
The second equation is 21x - 3y = 10
Multiplying 3 to the first equation, we get
21x - 3y = 15, whose left hand side is similar to the that of the second equation.
The constant part for the equations are different.
Thus the lines are parallel to each other.
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plotting the points A(0,-5) and B(1,2) on the graph and joining them we get a straight line.
plotting the points C and D on the graph and joining them we get a straight line.
From the graph ,we conclude that these two lines are parallel.
•••♪
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Answer :-
Option ( d ) parallel is correct :)
Refer the attachment for explanation :)
