Plz help A system of equations is given below.

y = negative 3 x + 6 and y = 6 minus 3 x

Which of the following statements best describes the two lines?
They have different slopes and different y-intercepts, so they have no solution.
They have different slopes and different y-intercepts, so they have one solution.
They have the same slope and the same y-intercept, so they have no solution.
They have the same slope and the same y-intercept, so they have infinitely many solutions.