15 Questions | Attempts: 628  Settings  • 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)

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