Quadratic functions
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Phan Phan
Used 5+ times
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12 questions
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1.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
Which of the following relations (functions) is quadratic?
y = 3x -2
y = x2 +3x -4
y = (x+2)2 -3
y = (2x2+1)2
y = x(x+3)2
2.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
Which is quadratic function?
y= (2x+3)(x+1)
y = x2 - 5x - 6
y = x3 -2x2 +3x +1
y = 3x + 5
y = x2 + 2x + (1-x)(1+x) + 4
3.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
Which of the following functions represents a parabola?
y = 3x +2
x2 + y2 = 9
y = (x-1)2
4.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Antoine throws a ball to his dog, who will catch the ball at a height of 1 meter above ground. The ball's height (in meters above the ground), x seconds after Antoine threw it, is modeled by: h(x)=−2x2 + 9.8x + 2
How many seconds after being thrown will the dog catch the ball?
5.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Antoine throws a ball to his dog, who will catch the ball at a height of 1 meter above ground. The ball's height (in meters above the ground), x seconds after Antoine threw it, is modeled by: h(x)=−2x2 + 4x + 48
What is the maximum height that the ball can reach?
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
A farmer wants to make a rectangular pen for his sheep. He has 100m fencing material to cover three sides with the other side being a brick wall. How should he choose the width of the pen to maximize the space for his sheep?
7.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
The number of mosquitoes in Anchorage, Alaska (in millions of mosquitoes) as a function of rainfall (in centimeters) is modeled by: m(x)=-x2+14x
How many centimeters of rain will produce the maximum number of mosquitoes?
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