# Algebra 2 Quiz On Parabolas

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| By Migueldelarosa
M
Migueldelarosa
Community Contributor
Quizzes Created: 1 | Total Attempts: 800
Questions: 5 | Attempts: 801  Settings  This is a short quiz to determine if the students are ready for a unit test on parabolas. The questions emphasize the key points that I have been trying to highlight during the instruction.

• 1.

### For the following quadratic function: y=2(x-3)2-4, what is the formula for the axis?

• A.

X=3

• B.

X=-3

• C.

Y=3

• D.

Y=-3

• E.

X=2

A. X=3
Explanation
The formula for the axis of symmetry of a quadratic function in the form y = a(x-h)^2 + k is x = h. In this case, the quadratic function is y = 2(x-3)^2 - 4, so the formula for the axis of symmetry is x = 3.

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• 2.

### What are the coordinates of the vertex?

• A.

(4, -3)

• B.

(3, -4)

• C.

(2, 4)

• D.

(4, 2)

• E.

(4, -2)

B. (3, -4)
Explanation
The coordinates of the vertex can be determined by finding the midpoint between the x-coordinates and the y-coordinates of the given points. In this case, the midpoint between 4 and 2 is 3, and the midpoint between -3 and -2 is -4. Therefore, the coordinates of the vertex are (3, -4).

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• 3.

• 4.

### The y-intercept is (0, _____).

(0, 4)
Explanation
The y-intercept is the point where a line or curve intersects the y-axis. In this case, the y-intercept is given as (0, 4), which means that the line or curve crosses the y-axis at the point (0, 4). This means that when x is 0, the corresponding y value is 4.

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• 5.

### What are the x-intercepts?

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