What is the domain of the relation below? is the relation a function? {(–5, 2), (7, 7), (3, 6), (1, 7)} question 3 options: domain: {–5, 1, 7}; yes, it is a function domain: {–5, 1, 3, 7}; no, it is not a function domain: {–5, 1, 3, 7}; yes, it is a function domain: {2, 6, 7}; yes, it is a function domain: {2, 6, 7}; no, it is not a function