Understanding Functions and Their Applications

Question 1: A function f(x) is defined as 'Adding 3 to every integer x'. If x = 5, what is f(x)?

• 10

• 8

• 6

• 12

Question 2: The function g(x) is 'Multiplying integer x by 2, then subtracting 1'. If x = 4, what is g(x)? A. 6 B. 7 C. 8 D. 9

• 10

• 5

• 3

• B. 7

Question 3: If the function h(x) is 'Converting temperature from Celsius to Fahrenheit using the formula h(x) = (9/5)x + 32', what is h(x) if x = 0°C? A. 32°F B. 0°F C. 100°F D. 50°F

• 50°F

• 25°F

• 32°F

• 75°F

Question 4: In daily life, functions can be used to calculate total purchase costs. If the cost function C(x) is 'Multiplying the number of items x by the price per item of 10,000 rupiah', what is the total cost if 3 items are bought? A. 10,000 rupiah B. 20,000 rupiah C. 30,000 rupiah D. 40,000 rupiah

• 15,000 rupiah

• C. 30,000 rupiah

• 10,000 rupiah

• 25,000 rupiah

Question 5: The function f(x) = x^2 - 2x + 1 is used to calculate the area of a square garden with side length x. What is the area if x = 4? A. 8 B. 12 C. 16 D. 20

• C. 16

• B. 12

• A. 8

• D. 20

Question 6: If the function j(x) is defined as 'Subtracting 5 from x', what is j(10)? A. 5 B. 10 C. 15 D. 20

• 5.5

• 10

• 0

• A. 5

Question 7: The function k(x) is 'Dividing x by 2'. What is k(8)? A. 2 B. 4 C. 6 D. 8

• 1

• 5

• 3

• B. 4

Question 8: If the function m(x) is 'Adding 10 to x and then multiplying by 2', what is m(5)? A. 20 B. 30 C. 40 D. 50

• 30

• 15

• 25

• 10

Question 9: The function n(x) is defined as 'Taking the square root of x'. What is n(16)? A. 2 B. 4 C. 8 D. 16

• 10

• B. 4

• 5

• 3

Question 10: If the function p(x) is 'Cubing x', what is p(3)? A. 6 B. 9 C. 27 D. 30

• 21

• 18

• C. 27

• 12