Answer:
x = 6
Explanation:
A straight line is given by the following equation:
Y = mx + c
where y = function of the line with respect to x
m = gradient of the line
c = y -intercept
If the line has no slope, then m = 0
subsequently, the line becomes:
y = c
c is a constant (or number)
in this case, the equation will be a straight vertical line crossing the x = axis.
Therefore, y = c is the x- axis
in this case , the equation is x = 6
Hence the line has no slope.