12. Starting from the base of a hill, a car drives (in a straight line) to the end of a road located at its summit. If the starting position of the car is define by the coordinate and the hill peak (where the road ends) has coordinates what is the gradient of the hill? Options : A. 1 Gradient = Ave - 95. B. 2 C. 4 Model Solution suggest that ANSWER is 8! Can someone explain why? E. 16 13. When this vehicle has climbed up to a height of 55 metres on the hill (i.e. y = 55) what is the horizontal distance that has been travelled at this point (i.e. the corresponding value of x)? Options In detail Please! A. 21 metres. B. 23 metres. C. 25 metres. D. 27 metres. E. 29 metres