The following table shows $\left(x, \; y\right)$ values for a linear function. What is the slope of this function?

A. $3$

B. $2$

C. $6$

D. $9$

E. $1$

$x$ | $y$ |

2 | 9 |

3 | 12 |

7 | 24 |

8 | 27 |

A. $3$

B. $2$

C. $6$

D. $9$

E. $1$