Which set of ordered pairs represents y as a function of x?

\left\{\left(-9,\ 2\right),\ \left(0,\ 6\right),\ \left(1,\ -2\right),\ \left(-3,\ 6\right)\right\}

\left\{\left(5,\ 4\right),\ \left(2,\ 3\right),\ \left(1,\ 1\right),\ \left(2,\ 4\right)\right\}

\left\{\left(-1,\ 0\right),\ \left(4,\ 3\right),\ \left(-7,\ -3\right),\ \left(-1,\ -8\right)\right\}

\left\{\left(3,\ 2\right),\ \left(-4,\ -2\right),\ \left(3,\ 1\right),\ \left(-4,\ 1\right)\right\}

Algebra 1 Q1 Exam Retake

Algebra 1 Q1 Exam Retake | Quizalize