The time it takes for the sound of thunder to travel one kilometer can be modeled by the function 1,000
f(x) =
0.6x2 + 331
where x is the air temperature, in degrees Celsius.
1,000
The graph of f(3) = is shown below. Which statement about the graph is true?
0.62? + 331
JA
S
As the temperature increases on the interval
(-40,0), the amount of time it takes for the sound of
thunder to travel 1 kilometer decreases.
4
2
As the temperature increases on the interval
(0,40), the amount of time it takes for the sound of
thunder to travel 1 kilometer increases.
-50 -40 -30 -20 -10
10 20 30 40 50 x
-1
-2
The maximum amount of time it takes for the sound
of thunder to travel 1 kilometer occurs when the
temperature is 0° Celsius.
-3
-4
-5
The minimum amount of time it takes for the sound
of thunder to travel 1 kilometer occurs when the
temperature is 0° Celsius.