The table shows the linear relationship between the time, , in weeks, since a plant was planted and its height, , in centimeters.
| Time (weeks) (t) | Height (cm) (h) |
|---|---|
| 3 | 21 |
| 7 | 37 |
| 10 | 49 |
Based on the table, what was the initial height, in centimeters, of the plant?
