I need help with these two questions

0 2 3 5 6 7 X 4 231 253.3 273.8 284.1 294.1 303.6 368.6 383.7 The given data can be modelled by a cubic regression function. 12. When written in the form y = ax3 + bx2 + ex + d, the value of a, to the nearest hundredth is Use the following information to answer question 13. The table below shows the relationship between the speed of a particular car and the distance that it requires to stop after the brake has been applied with a given pressure. Speed (km/h) Stopping Distance (m) 40 6.6 60 14.9 80 26.5 90 33.5 100 41.4 This data can be modelled by a quadratic regression equation in the form y = ax+ bx + c where x represents the speed and y represents the stopping distance. 13. If the stopping distance of the car is 30.7 m, the car was travelling at a speed, to the nearest kilometre per hour, of km/h