Module 3: Functions and Models

1. Solve 6+3x=18 for x

• 4
• 6
• 12

2. Sonia threw a ball off the end of a building. Explain how the graph will look.

3. What is the range of the following set of points? {(3,4), (7,-2), (11,-8)}?

• {3, 7, 11}
• {-8, -2, 3, 4, 7, 11}
• {-8, -2, 4}

4. A car uses a gallon of gas for every 45 miles driven. What is the dependent variable?

• the number of cars

• the number of gallons

• the cost of gas per gallon

5. identify and justify if the diagram is or is not a function.

6. Fernando makes $17 an hour at work. Which function could represent his pay for each day of work?

• f(x)=x+17
• f(x)=17x
• f(x)=17-x

7. What is the value of f(x) when x=-2?

• 2

• 3/4

• 1/2

8. Solve 5(y+4)=6y

9. Anusha walked to school this morning. It took her 10 minutes. She jogged the last 5 minutes to get there on time. What is the independent variable?

• Time to get to school
• Distance Anusha was from school

10. a. Kerri earns $15 an hour for tutoring. Write a function for Kerri's weekly pay.