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Q.

If a pair of linear equations are consistent then the lines are


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a

Parallel

b

Always consistent

c

Intersecting or coincident

d

Always intersecting 

answer is C.

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Detailed Solution

We are asked to find if a pair of linear equations are consistent then what will be the lines called.
A pair of linear equation of two variables x and y is represented as the general form:
 a1x+b1y+c1=0  and a2x+b2y+c2=0, where a1, a2,b1,b2,c1,c2 are constants. The graph of the linear equation is always a straight line.
Since it is consistent, the lines have a solution.
Thus, the graph of a pair of linear equations can either intersect at a point or be coincident.
So, the correct option is 3.
 
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