When using a vertical number line do the negative numbers go on the bottom or top?

Nine people are going to share a 128-ounces bottle of soda. how many ounces will each person get drink? choose the correct equation and answer for this situation

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i