Parabola Quiz StVer
Wednesday, December 31, 2014
11:38 AM
Question 1
1. Write the equation of the parabola in standard form:
.
3 points
Question 2
1. Write the equation of the parabola in standard form:
.
3 points
Question 3
1. Write the equation of the parabola in general form:
.
3 points
Question 4
1. Write the equation of the parabola in general form:
.
3 points
Question 5
1. Find the vertex of the parabola:
.
(-1, 3)
(-1, -3)
(1, 3)
(1, -3)
3 points
Question 6
1. Find the focus of the parabola:
.
(1,3)
(3, 3)
(1, -3)
(3, -3)
3 points
Question 7
1. Find the directrix of the parabola:
.
x=0
x=1
x = -1
x=2
3 points
Question 8
1. Find the vertex of the parabola:
.
(-3, 1)
(-3, -1)
(3, 1)
(3, -1)
3 points
Question 9
1. Find the focus of the parabola:
.
(4, 1)
(4, 5)
(-4, 1)
(-4, 5)
3 points
Question 10
1. Find the directrix of the parabola:
.
y=3
y = -1
y=2
y=1
3 points
Question 11
1. Which of the following shows the graph of the parabola
?
3 points
Question 12
1. Which of the following shows the graph of the parabola
?
3 points
Question 13
1. A penny is dropped from the top of a 1,000-foot building. The function
gives the height of the penny t seconds after it starts falling. How long will it take for the penny to
reach the ground? Round the answer to the nearest tenth of a second.
7.9 seconds
6.5 seconds
4.4 seconds
2.8 seconds
3 points
Question 14
1. It costs John’s Manufacturing C dollars per hour to operate its golf ball division. An analyst has
determined that C is related to the number of golf balls produced per hour, x, by the equation
. What number of golf balls per hour should John’s Manufacturing produce to minimize the cost per
hour of manufacturing them?
100 golf balls
150 golf balls
200 golf balls
250 golf balls
3 points
Question 15
1. A golf ball is hit off the top of a cliff that is 100 feet tall at an angle of 45° to the horizontal with an
initial velocity of 95 feet per second. The quadratic equation shown below models the height, h(x),
of the ball when it is x feet from the cliff’s edge. How high above the ground will the ball be when it
is 100 feet from the cliff’s edge? Round the answer to the nearest hundredth.
85.92 feet
100.51 feet
133.55 feet
164.54 feet
3 points
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