help with math problem?

i know what the answer is to this problem but i dont know how to do it. can someone show me how?Suppose u are trying to predict the likelihood of a car accident as a function of the driver's age. From previous accident records, u note the following data:Age Accidents(per 11 million km driven20 44030 28040 200u assume a quadractic model is reasonable because u believe the number of accidents should reach a minimum and then go up for driverswrite the particular equation expresing accidents per 1oo million km driven in terms of age. the answer is A=0.4t^2-36t+1000but how do u do it?!