Let f(x, y) = 7ln(18x² — 9y). - Graph the boundary of the domain of f below. 7- 6- 5 4- 3 2 1 27 -7-6-5-4-3-2-1 1 2 3 4 5 6 7 -1 -2 -3- -4 -5 -6- -7- Clear All Draw: く Which of the following (x, y) ordered pairs are in the domain of f? Select all that app