The following table shows $\left(x, \; y\right)$ values for a linear function. What is the slope of this function?
A. $4$
B. $3$
C. $12$
D. $10$
E. $1$
| $x$ | $y$ |
| 3 | 15 |
| 4 | 19 |
| 9 | 39 |
| 10 | 43 |
A. $4$
B. $3$
C. $12$
D. $10$
E. $1$
