Quadratic Functions: Standard Form

Question 1

The graph of which function will have a maximum and a y-intercept of 4?

Revolt · Accepted Answer

C: f(x) = –x2 + 2x + 4

Question 2

Use the drop-down menus to describe the key aspects of the function f(x) = –x2 – 2x – 1.

Revolt · Accepted Answer

The vertex is the .: maximum value; The function is increasing .: when x < –1; The function is decreasing .: when x > –1; The domain of the function is .: all real numbers; The range of the function is .: all numbers less than or equal to 0

Question 3

The graph of the function f(x) = x2 + 8x + 12 is shown. Which statements describe the graph? Check all that apply.

Revolt · Accepted Answer

B: The axis of symmetry is x = –4.; C: The domain is all real numbers.; F: The x-intercepts are at (–6, 0) and (–2, 0).

Question 4

The axis of symmetry for the function f(x) = –2x2 + 4x + 1 is the line x = 1. Where is the vertex of the function located?

Revolt · Accepted Answer

B: (1, 3)

Question 5

Which functions have an axis of symmetry of x = –2? Check all that apply.f(x) = x2 + 4x + 3f(x) = x2 – 4x – 5f(x) = x2 + 6x + 2 f(x) = –2x2 – 8x + 1f(x) = –2x2 + 8x – 2

Revolt · Accepted Answer

A: f(x) = x2 + 4x + 3; D: f(x) = –2x2 – 8x + 1

Question 6

Consider the function f(x) = x2 + 2x – 15. What are the x-intercepts of the function?

Revolt · Accepted Answer

: 80616; : 3

Question 7

Which must be true of a quadratic function whose vertex is the same as its y-intercept?

Revolt · Accepted Answer

A: The axis of symmetry for the function is x = 0.

Question 8

Which error did Mathieu make?

Revolt · Accepted Answer

C: He set the factored expressions equal to each other.

Question 9

Use the drop-down menus to describe the key aspects of the function f(x) = –x2 – 2x – 1.

Revolt · Accepted Answer

B: ✔ maximum value

Question 10

Question 10

Revolt · Accepted Answer

3

Quadratic Functions: Standard Form Answers

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