A line passes through the points (9, 30) and (18, 30). Which statement is true about the line?
A
It has a slope of zero because the change in the y-values is 0.B
It has no slope because the change in the y-values is 0.C
It has a slope of zero because the change in the x-values is 0.D
It has no slope because the change in the x-values is 0.