
Interpreting Quadratic Functions
Authored by Anthony Clark
Mathematics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The height of a water balloon that is launched into the air is given by h(t) = -5t2 + 40t + 2. From what height was the balloon released?
2 meters
5 meters
40 meters
20 meters
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation
h(t) = -16t2 +128t
When will the object reach its maximum height?
4 ft
0 seconds
0 ft
4 seconds
None of the above
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fireworks are fired from the roof of a 100-foot building. The equation h = -16t2 +84t + 100 models the height, h, of the fireworks at any given time, t. How high do the fireworks get?
2.625
6.25
100
200
210.25
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A dolphin jumps from the water at at initial velocity of 16 feet per second. The equation h = -8t2 + 16t models the dolphin's height at any given time, t. What is the maximum height the dolphin jumps?
1 foot
5 feet
7 feet
8 feet
12 feet
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the vertex?
(5,2)
(2,5)
(-2,5)
(-5,2)
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the standard form of a quadratic function?
y=mx+b
ax+by=c
y=ax2+bx+c
y=(x+a)(x-b)
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suppose a parabola has vertex (1,-4) and also passes through the point (2,-1). Write the equation of the parabola in vertex form.
y = (x - 1)2 - 4
y = 3(x - 1)2 + 4
y = 3(x - 1)2 - 4
y = 3(x + 1)2 - 4
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