1 Safety authorities advise drivers to travel three seconds behind the car in front of them. This gives the driver a greater chance of avoiding a collision if the car in front has to brake quickly or is itself involved in an accident. A test was carried out to nd out how long it would take a driver to bring a car to rest from the time a red light was ashed. The following results are for one driver in the same car under the same test conditions. \"WEE! mm--Wm I The least squares regression line has the equation t = 0.031: + 0.9. 5 Use the equation in I to estimate the stopping time for a speed of: I 55 kmh'l II 110 kmh\"1 Which of your estimates in his more likely to be reliable