Quadratic Graphs And Equations

15 Questions | By Latshawfive | Last updated: Apr 23, 2014 | Total Attempts: 443

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Questions and Answers

1.

Solve. 8x² + 10x + 3 = 0
- A.
  
  X = -8 and -4
- B.
  
  X = -2 and -6
- C.
  
  X = -1.5 and -0.167
- D.
  
  X = -0.75 and -0.5
2.

Solve. 1x² + 12x + 32 = 0
- A.
  
  X = -8 and -4
- B.
  
  X = -2 and -6
- C.
  
  X = -1.5 and -0.167
- D.
  
  X = -0.75 and -0.5
3.

Solve. 16x² + 20x = 0
- A.
  
  X = 0 and 1.25
- B.
  
  X = 0 and -5
- C.
  
  X = 0 and -1.25
- D.
  
  X = -1.25
4.

Which best describes the graph of a quadratic function?
- A.
  
  A line.
- B.
  
  A parabola
- C.
  
  A v-shape.
- D.
  
  A circle
5.

How do you change the concavity of the graph of a quadratic function written in standard form?
- A.
  
  Change the value of a to its opposite.
- B.
  
  Change the value of b to its opposite.
- C.
  
  Change the value of c to its opposite.
- D.
  
  Take the square root of both sides.
6.

Subtracting 7 from y=x²+2x will move the graph how?
- A.
  
  Left 7.
- B.
  
  Right 7.
- C.
  
  Up 7.
- D.
  
  Down 7.
- E.
  
  None of these.
7.

To make the graph y=x²+4x+7 grow faster (more narrow) I could do the following:
- A.
  
  Change a to 1/2.
- B.
  
  Change a to -1.
- C.
  
  Change a to 3.
- D.
  
  Change c to 10.
8.

Can the graph of a quadratic function ever have three x-intercepts?
- A.
  
  Yes.
- B.
  
  No.
9.

Quadratic functions have a line of symmetry. True or False?
- A.
  
  True.
- B.
  
  False.
10.

The graph of y=x² has a
- A.
  
  Maximum
- B.
  
  Minimum
11.

Solve. x² - 100 = 0
- A.
  
  X =10
- B.
  
  X = 50
- C.
  
  X = 50 and -50
- D.
  
  X = 10 and -10
12.

Use the discriminant to find the number of real solutions. 2x² + 5x + 7 = 0
- A.
  
  0
- B.
  
  1
- C.
  
  2
13.

Solve. x² - 3x - 2 = 0
- A.
  
  X =10 and -7
- B.
  
  X is approximately 3.56 and -0.56
- C.
  
  X is approximately 5.06 and -0.94
- D.
  
  No real solutions
14.

Find the roots of y = x² + 2x - 24
- A.
  
  (0,6) and (0,-4)
- B.
  
  (6,0) and (-4,0)
- C.
  
  (0,-6) and (0,4)
- D.
  
  (-6,0) and (4,0)
15.

Identify the vertex of y = 2x² + 12x + 3
- A.
  
  (-3, -15)
- B.
  
  (-3, -51)
- C.
  
  (-6, 3)
- D.
  
  (-6, -141)