question_answer

The pair of equations x = a and y = b graphically represents lines which are

A) parallel

B) intersecting at (b, a)

C) coincident

D) intersecting at (a, b)

Correct Answer: D

Solution :

By graphically in every condition, if a, b > 0; a, b < 0, a > 0, b < 0; a < 0, b > 0 but \[a=b\ne 0\] The pair of equations x = a and y = b graphically represents lines which are intersecting at (a, b). It a, b>0 Similarly, in all cases two lines intersect at (a, b).