Quadratic Functions: Vertex Form — Unit test

Question 1

Over which interval does the exponential show a more rapid rate of change?

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/evresources/6129-01-05/mc025-4.jpg

Question 2

What is the y-value of the vertex of the function f(x)=−(x+8)(x−14)?

Revolt · Accepted Answer

121

Question 3

three

Revolt · Accepted Answer

The vertex is the maximum value.; The axis of symmetry is x = .; The domain is all real numbers.

Question 4

Jack and Susie want to save to buy a trampoline for their children. They each open a savings account that earns 1.5% a year. Jack opens his account with $1,000, and Susie opens her account with $800. x = number of yearsThe following functions represent the value of the savings accounts in x years:Jack’s savings account: f(x) = 1000(1.015)xSusie’s savings account: g(x) = 800(1.015)x Which function represents the total amount Jack and Susie will save in x years?

Revolt · Accepted Answer

1800(1.015)x

Question 5

three

Revolt · Accepted Answer

The graph of the function is a parabola.; The graph contains the point (20, –8).

Question 6

The dimensions of a triangle are represented by the functions shown.

Revolt · Accepted Answer

g(x) = 12x2 – 6x

Question 7

Which function has a vertex on the y-axis?

Revolt · Accepted Answer

f(x) = (x – 2)(x + 2)

Question 8

three

Revolt · Accepted Answer

The vertex of the function is at (–3,–16).; The graph is increasing on the interval x > –3.; The graph is positive only on the intervals where x 1.

Question 9

Giselle graphs the function f(x) = x2. Robin graphs the function g(x) = –x2. How does Robin’s graph relate to Giselle’s?

Revolt · Accepted Answer

Robin’s graph is a reflection of Giselle’s graph over the x-axis.

Question 10

What are the x-intercepts of the graph of the function f(x) = x2 + 5x − 36?

Revolt · Accepted Answer

(4, 0) and (−9, 0)

Quadratic Functions: Vertex Form — Unit test Answers

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