Question

Write the equation of a line parallel to y=3

Answer 1

The line y=3 is a horizontal line, and a horizontal line has a slope of zero. The only lines parallel to a horizontal line are other horizontal lines. Therefore, there is no slope. The slope is the coefficient of x in the slope-intercept form: y = mx + b. m stands for the slope, and b is the y-intercept.

Answer 2

$y = 4$
You could use Y equals any number, becuase it is a horizontal line therefore the slope equals 1 and any Y intercept would work.