Which of the following could be the equation of a line parallel to the line y = 4 ? A- undefined
B- y=0
C- x=4
D- y=4x

Option B: is the equation of the line parallel to the line

The general equation of a line is where, is the slope of the line and is the constant.

For a line to be parallel with the line , the slope must be equals to .

So, is the only option in which the slope is equals to zero and so, it is parallel to the line .

Learn more about parallel lines here:

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B

Step-by-step explanation:

y = 4 is a horizontal line parallel to the x- axis

A parallel line must also be horizontal with equation

y = c ( c is the value of the y- coordinates the line passes through )

The only equation in this form is

y = 0 ( the equation of the x- axis ) → B