The following table shows $\left(x, \; y\right)$ values for a linear function. What is the slope of this function?
A. $5$
B. $3$
C. $15$
D. $7$
E. $1$
| $x$ | $y$ |
| 3 | 17 |
| 4 | 22 |
| 8 | 42 |
| 9 | 47 |
A. $5$
B. $3$
C. $15$
D. $7$
E. $1$
