Explain, using the theorems, why the function is continuous at every number In its domain. VX - 7 x- 7 Q Q(x) is a polynomial, so it is continuous at every number in its domain. Q Q(x) is a rational function, so it is continuous at every number in its domain. Q Q[x] is built up from functions that are continuous for all real numbers, so it is continuous at every number in its domain. O o(x) is not continuous at every number in its domain. O none of these State the domain. (Enter your answer using interval notation.) Need Help? Watch It