+140 The coast-down time y for a car as it drops 10mph from am initail speed x depends on sevral factors, such as avarge drag, tire pressure, and whether the transmission is in nutral. The following gives coast-down time in seconds for a car under standard conditions for selected speeds.
Intital speed coast-down time initial speed coast-down time
(in mph) (in seconds) (in mph) (in seconds)
30 29 50 18
35 27 55 15
40 23 60 14
45 20 65 13
Use a quadratic regression feature of graphing caculator to find the quadratic function g that best fits the data.
Form your answer in g(x)=__x^2-__x+__.
Round to four decimal places.
my math teacher gave this to the whole class and no one solved it.
