AnswersLAUSD-Algebra I Prescriptive - SummerUnit Test

Unit Test — Unit test Answers

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What is the first step in writing f(x) = 6x2 + 5 – 42x in vertex form?

A
Factor 6 out of each term.
B
Factor 6 out of the first two terms.
C
Write the function in standard form.
D
Write the trinomial as a binomial squared.
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The graph below shows the exponential function and the linear function .What is the minimum y-value after which the exponential function will always be greater than the linear function?

Question illustration
A
y = 1
B
y = 2
C
y = 3
D
y = 4
23

Which statements are true about the graph of the function f(x) = x2 – 8x + 5? Select three options.The function in vertex form is f(x) = (x – 4)2 – 11.The vertex of the function is (–8, 5).The axis of symmetry is x = 5.The y-intercept of the function is (0, 5).The function crosses the x-axis twice.

A
The function in vertex form is f(x) = (x – 4)2 – 11.
B
The vertex of the function is (–8, 5).
C
The axis of symmetry is x = 5.
D
The y-intercept of the function is (0, 5).
E
The function crosses the x-axis twice.
24

What value for c will make the expression a perfect square trinomial? x2 – 7x + c

A
negative StartFraction 49 Over 4 EndFraction
Option A
B
negative seven-halves
Option B
C
seven-halves
Option C
D
StartFraction 49 Over 4 EndFraction
Option D
25

Which statement best describes the growth rates of the functions below?

Question illustration
A
The quadratic function grows faster than the exponential function over the entire interval; 0<x<4.
B
The exponential function grows faster than the quadratic function over the entire interval; 0<x<4.
C
The exponential function grows faster than the quadratic function over only one interval; 2<x<3.
D
The exponential function grows faster than the quadratic function over two intervals; 2<x<4.

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