For the function, find the points on the graph at which the tangent line is horizontal. If none exist, state that fact. y = 6x - 1 List all the points where the tangent line is horizontal. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. Add a O A. The point(s) at which the tangent line is horizontal is(are) (Type an ordered pair. Use a comma to separate answers as needed.) O B. The tangent line is horizontal at all points of the graph. 8 questions left to ask Q&A 8 questions expire this mont O C. There are no points where the tangent line is horizontal