Solving Real-World Problems with Function Notation

1. A function f(x) represents the number of apples in a basket. If f(3) = 12, how many apples are in the basket when there are 3 baskets?

• 24

• 18

• 30

• 36

2. The function g(x) = 5x + 2 describes the cost of x notebooks. What is the cost of 4 notebooks?

• 20

• 22

• 18

• 25

3. If h(x) = 2x - 3 represents the temperature in degrees Celsius after x hours, what is the temperature after 5 hours?

• 10 degrees Celsius

• 3 degrees Celsius

• 0 degrees Celsius

• 7 degrees Celsius

4. A function p(x) = 3x + 1 models the number of pages read in x days. How many pages are read in 7 days?

• 22

• 10

• 30

• 15

5. The function q(x) = x^2 represents the area of a square with side length x. What is the area when x = 6?

• 24

• 48

• 36

• 12

6. If r(x) = 10 - 2x shows the remaining money after spending x dollars, how much money is left after spending 3 dollars?

• 5

• 1

• 4

• 2

7. The function s(x) = 4x + 5 describes the total distance traveled in x hours. How far is traveled in 2 hours?

• 10

• 20

• 13

• 15

8. If t(x) = 7x - 4 represents the number of tickets sold after x days, how many tickets are sold after 10 days?

• 60

• 70

• 50

• 66

9. A function u(x) = 3x + 6 models the height of a plant in cm after x weeks. What is the height after 4 weeks?

• 18 cm

• 12 cm

• 24 cm

• 30 cm

10. The function v(x) = 2x^2 + 3x represents the total cost of x items. What is the total cost for 5 items?

• 65

• 80

• 100

• 50