# Algebra 1b: Unit 5 Obj 1: Evaluate A Function

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Vicki Barr
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Given a function, students will evaluate for a certain value of x

• 1.

### Evaluate the function.  Let f(x) = Find f(5) =

• A.

64

• B.

28

• C.

22

• D.

8

B. 28
Explanation
To evaluate the function f(x), we need to substitute x with 5. Therefore, f(5) = 28.

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• 2.

### Evaluate the function.  Let f(x) = Find f(-7) =

• A.

52

• B.

-46

• C.

16

• D.

-16

A. 52
Explanation
To evaluate the function f(x), we need to substitute x with -7. So, f(-7) = 52.

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• 3.

### Let g(x) = 8 - x + 6x     Evaluate g(5)

• A.

27

• B.

33

• C.

28

• D.

-27

B. 33
Explanation
The given function is g(x) = 8 - x + 6x. To evaluate g(5), we substitute x = 5 into the function. g(5) = 8 - 5 + 6(5) = 8 - 5 + 30 = 33.

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• 4.

### Let h(x) = Evaluate h(16)

• A.

3

• B.

9

• C.

-3

• D.

21

C. -3
Explanation
The function h(x) is not given, but we are asked to evaluate h(16). The answer given is -3. This suggests that when x is equal to 16, h(x) is equal to -3.

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• 5.

### Solve the function h(x) = -2x + 13 for x = - 4

• A.

5

• B.

-5

• C.

13

• D.

21

D. 21
Explanation
To solve the function h(x) = -2x + 13 for x = -4, we substitute x = -4 into the function. By substituting the value, we get h(-4) = -2(-4) + 13 = 8 + 13 = 21. Therefore, the correct answer is 21.

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• Current Version
• Mar 21, 2023
Quiz Edited by
ProProfs Editorial Team
• Jun 27, 2014
Quiz Created by
Vicki Barr

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