The following table shows $\left(x, \; y\right)$ values for a linear function. What is the slope of this function?
A. $5$
B. $2$
C. $10$
D. $4$
E. $1$
| $x$ | $y$ |
| 2 | 13 |
| 5 | 28 |
| 9 | 48 |
| 12 | 63 |
A. $5$
B. $2$
C. $10$
D. $4$
E. $1$
