The slope of a line is 0, and the y-intercept is 6. the equation, written as y = 6, represents a horizontal line
true or false?

Given the slope (m) of the line and the y-intercept (b), the equation of the line may be expressed in slope-intercept form. Below is the expression, 
                                      y = mx +b
Substituting the known values, 
                                       y = 0(x) + 6
This simplifies into y = 6 which is a horizontal line which is 6 units above the origin. Thus, the answer is TRUE. 

Hnmmmn not sure