Unit 4 Lesson 11 Practice Problems

Select the best description of the range of this function.

• The range includes all numbers from 5 to 12.5.

• The range includes all integers between 0 and 12.5.

• The range includes all numbers from 0 to 8.5.

• The range includes all numbers from 0 to 12.5.

To raise funds for a trip, members of a high school math club are holding a game night in the gym. They sell tickets at $5 per person. The gym holds a maximum of 250 people. The amount of money raised is a function of the number of tickets sold.

Which statement accurately describes the domain of the function?

• all numbers less than 250

• all integers

• all positive integers

• all positive integers less than or equal to 250

C gives the cost, in dollars, of a cafeteria meal plan as a function of the number of meals purchased,n . The function is represented by the equation C(n)= 4+3n.

Find C(n)=31.

• 8

• 9

• 10

• 11

C gives the cost, in dollars, of a cafeteria meal plan as a function of the number of meals purchased,n . The function is represented by the equation C(n)= 4+3n.

What does the function represent?

• The cost of a meal plan is 4 dollars plus 3 dollars for each meal.

• The cost of a meal plan is 3 dollars plus 4 dollars for each meal.

• The cost of a meal plan is 4 dollars times 3 dollars for each meal.

• The cost of a meal plan is 3 dollars minus 4 dollars for each meal.

• A: 3, B: 4, C: 2, D: 1

• A: 4, B: 3, C: 2, D: 1

• A: 3, B: 4, C: 1, D: 2

• A: 4, B: 3, C: 1, D: 2

The graph H shows the height, in meters, of a rocket t seconds after it was launched.

Find H(0)?

• 20

• 10

• 15

• 5

The graph H shows the height, in meters, of a rocket t seconds after it was launched.

Describe the domain.

• The domain includes all values from 0 to approximately 4.5.

• {0, 4.5)

• The domain includes all values from 0 to approximately 5

• (0, 5)

The graph H shows the height, in meters, of a rocket t seconds after it was launched.

Describe the range.

• The range includes all values from 0 to 15 meters.

• (0, 15)

• The range includes all values from 0 to 35 meters.

• {0, 35}

• The range includes all values from 0 to 30 meters.

The graph H shows the height, in meters, of a rocket t seconds after it was launched.

Find H(n)=0.

• 4.5

• 15

• 35

• 5

• 0

Mai has to decide between two cafeteria meal plans. Under plan A, each meal costs $2.50. Under plan B, one month of meals costs $30.

Write a function for Plan A.

• A(x)=2.50x

• A(x)=30

• A(x)=2.50x+30