Edexcel Mathematics June 2019 · Paper 1 · Question 7 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

June 2019 · Paper 1 · Question 7 · 7 marks

7. In a simple model, the value, £ V, of a car depends on its age, t, in years. The following information is available for car A Ɣ its value when new is £20 000 Ɣ its value after one year is £16 000 (a) Use an exponential model to form, for car A, a possible equation linking V with t. (4) The value of car A is monitored over a 10-year period. Its value after 10 years is £2 000 (b) Evaluate the reliability of your model in light of this in formation. (2) The following information is available for car B Ɣ it has the same value, when new, as car A Ɣ its value depreciates more slowly than that of car A (c) Explain how you would adapt the equation found in (a) so t hat it could be used to model the value of car B. (1) 20

Lesson: Exponential Functions and Their Graphs