Bunuel wrote:

What is the equation of line b which is parallel to line a?

(1) The slope of line a is 3/4 and it crosses the y-axis at 3.

(2) Line b has no point in common with line a.

Question stem:- What is the equation of line b which is parallel to line a

a) implies slope of line b-slope of line a =m (say)

b) Equation of line 'b' is in the form y=mx+c, where c(y-intercept of line b) can be 0, +/-. However, we need an unique value of 'c' so that equation of line 'b' be unique.

St1:-

The slope of line a is 3/4 and it crosses the y-axis at 3.Or, m=3/4 . Value of c is not known. c can have any value.

So, equation of line b is not unique.

Insufficient.

St2:-

Line b has no point in common with line a.This is the definition of parallel lines and this information is already stated in question stem. No new info.

Insufficient.

Combined, No new info.

Insufficient.

Ans. (E)

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Regards,

PKN

Rise above the storm, you will find the sunshine