WorksheetsModeling with Quadratic Functions
Total questions: 20
The height of an object thrown into the air can be modeled by the formula h(t) = -16t2 + 70t + 95, where h(t) is in feet after t seconds.
What is the height of the object after 5 seconds?
95 feet
45 feet
70 feet
171.56 feet
The equation h(t)=−16t2+350t+40 models the position of a rocket that was launched into the air. How do you find the time it will take for the rocket to reach maximum height?
Calculate the time using: t=−2ab
Plug the answer you get for the time into h(t)=−16t2+350t+40 to get the maximum height
Look for the maximum height given in the original equation
Find both coordinates of the vertex
The quadratic function shown below is used to model vertical motion. h(t)=−16t2+vot+ho If a soccer ball is kicked upward from ground level with an initial velocity of 64 ft/s, how long will it take to get to its maximum height?
t = 3 seconds
t = 10 second
t = 4 seconds
t = 2 seconds
When the question says, "What is the maximum height the ball reaches?", what are you looking for on the graph?
vertex
x-intercept
y-intercept
point on the graph
Q32
y = 0.001x2 - 0.426x + 35.672
y = -0.60x2 + 348.1x - 334.2
y = 0.001x2 + 35.672
y = -0.60x2 - 334.2
A company collected data for the number of text messages sent and received using a text-message application since October 2011. The table shows the number of text messages sent and received in billions over time. The data can be modeled by a quadratic function. Which function best models the data?
n(t)=−0.002t2 +0.55t+5.02
n(t)=0.072t2−0.15t+2.73
n(t)=−0.002t2 +5.02
n(t)=0.072t2+2.73
A
B
C
D
A
B
C
D
A projectile is launched into the air from the ground. The table shows the height of the projectile, h(t) , at different times.
Based on the table, which function can be used to model this situation?
h(t)=99t2+858
h(t)=−4.9t2+295t+0.6
h(t)=−4.9t2+295t+2
h(t)=99t2+1,470.3
A company collected data for the number of text messages sent and received using a text-message application since October 2011. The table shows the number of text messages sent and received in billions over time. The data can be modeled by a quadratic function. Which function best models the data?
n(t)=−0.002t2 +0.55t+5.02
n(t)=0.072t2−0.15t+2.73
n(t)=−0.002t2 +5.02
n(t)=0.072t2+2.73
Which function best models the data?
y=−1.51x2+283.75x−16.23
y=−16.23x2+283.75x−1.51
y=−1.51x2+16.23x−283.75
y=16.23x2+283.75x−1.51
TEK A.8 (B)
d(x) = 0.05x2 + 0.74x
d(x) = 0.05x2 + 0.74x + 9.17
d(x) = 0.26x2 – 3.11x
d(x) = 0.26x2 – 3.11x + 1
A
B
C
D
TEK A.8 (B)
d(x) = 0.05x2 + 0.74x
d(x) = 0.05x2 + 0.74x + 9.17
d(x) = 0.26x2 – 3.11x
d(x) = 0.26x2 – 3.11x + 1
The quadratic function shown below is used to model the vertical motion of a soccer ball being kicked from the ground level: h(t)=−16t2+64t . How high will it go?
100 feet
64 feet
140 feet
88 feet
A diver is standing on a platform above the pool. He jumps form the platform with an initial upward velocity of 8 ft/s. Use the formula: h(t) = −16 t2 + 8t + 24
How high is the platform?
.25 ft
24 ft
25 ft
8 ft
A kid launches a rock off of a cliff. The height of the rock after t seconds can be modeled by the graph shown. What is the height of the cliff?
1.094 ft
174.141 ft
155 ft
4.393 ft
None of the above
A kid launches a rock off of a cliff. The height of the rock after t seconds can be modeled by the graph shown. When does the rock hit the ground?
1.094 seconds
174.141 seconds
155 seconds
4.393 seconds
None of the above
A kid launches a rock off of a cliff. The height of the rock after t seconds can be modeled by the graph shown. What is the maximum height the rock reaches ?
1.094 ft
174.141 ft
155 ft
4.393 ft
None of the above
Answer KeyModeling with Quadratic Functions
Total questions: 20
45 feet
Calculate the time using: t=−2ab
t = 2 seconds
vertex
y = -0.60x2 + 348.1x - 334.2
n(t)=0.072t2−0.15t+2.73
B
B
h(t)=−4.9t2+295t+0.6
n(t)=0.072t2−0.15t+2.73
y=−16.23x2+283.75x−1.51
d(x) = 0.26x2 – 3.11x
A
d(x) = 0.26x2 – 3.11x
64 feet
24 ft
155 ft
4.393 seconds
174.141 ft
