Question 935937: The coast-down time y for a car as it drops 10 mph from an initial speed x depends on several factors, such as average drag, tire pressure, and whether the transmission is in neutral. The table gives coast-down time in seconds for a car under standard conditions for selected speeds.
Initial speed(in mph) 30, 35, 40, 45, 50, 55, 60, 65
Coast-down time(in seconds) 29, 27, 24, 21, 19, 17, 16, 14
Use a quadratic regression feature of a graphing calculator to find the quadratic function g that best fits the data.
g(x)=__x^2-__x+__
(Round to four decimal places as needed.)
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! ---
data:
---
30 29
35 27
40 24
45 21
50 19
55 17
60 16
65 14
---
y = 0.005xx - 0.9107142857x + 52.19642857
---
answer:
y = 0.005xx - 0.9107x + 52.1964
---
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