Question

Find the equation of line parallel to x-axis and passing through (3, 4).

(a) x=3

(b) x=4

(c) y=4

(d) y=3

I have been asked this question in a job interview.

This intriguing question comes from General Equation of a Line topic in division Straight Lines of Mathematics – Class 11

Answer 1

The correct choice is (c) y=4

For explanation: Let general equation of line be y=m*x + c.

Since line is parallel to x-axis so, m=0.

=>y=c=>y=4 by substituting the point (3, 4).