| miles per hour | reaction distance ft | breaking distance ft | total stopping distance ft |
| 30 | 30 | 45 | 75 |
| 50 | 50 | 125 | 175 |
| 70 | 70 | 245 | 315 |
This data is from a booklet called the Highway code which in issued to every new driver.
How can we use this data. Express equation in quadratic form
d=a+bv+cv2