Determine the domain of the function of two variables f(x ,y) = ?y + 9x.

Quiz Me: Quiz Me: 6.1-2 Find the domain of a function of several variables. Determine the domain of the function of two variables The domain is {(X,Y) Question 1 of 3 This quiz: 3 point(s) possible This question: 1 point(s) possible Y+9x. (Type an inequality. use a comma to separate answers as needed. use integers or fractions for any numbers in the inequality.)