Question

Which of the equations given below have graphs parallel to the x- axis?

• A. $x=4$
• B. $y-2=0$
• C. $x+5=0$
• D. $y=-5$

Answer 1

Answer: (B), (D)

The correct options are
B $y-2=0$
D $y=-5$

General form of an equation of a line parallel to x- axis is y = k where k is any constant.

y - 2 = 0 $\to$ y = 2.

$\to$ y = 2 and y = -5 are in the form y = k.

$\therefore$ the lines y - 2 = 0 and y = -5 are parallel to x- axis.