6th Grade Chapter 3

Every week, Kevin is paid d dollars for having worked h hours. Which statement describes the relationship between d and h?

• d is the dependent variable because h affects the number of dollars Kevin earns.

• d is the dependent variable because h affects the number of hours Kevin works.

• d is the independent variable because h affects the number of dollars Kevin earns.

• d is the independent variable because h affects the number of hours Kevin works.

When Ryan rides his bike from his house to school at a rate of r miles per hour, the trip takes him m minutes. Which statement describes the relationship between r and m?

• r is the dependent variable because r affects the number of minutes it takes Ryan to ride to school.

• r is the dependent variable because m affects how fast Ryan rides his bike.

• r is the independent variable because r affects the number of minutes it takes Ryan to ride to school.

• r is the independent variable because m affects how fast Ryan rides his bike.

Riley earns t dollars in tips when she serves c customers. Which statement describes the relationship between t and c?

• both variables are dependent variables.

• t is the dependent variable and c is the independent variable.

• both variables are independent variables.

• t is the independent variable and c is the dependent variable.

Which of the following is NOT an independent variable that could affect the gas mileage of an automobile?

• quality of tires

• weight of automobile

• horsepower of engine

• color of interior

Spreewell finds that the amount of time he spends studying for his history test affects his grade on the test. Which statement describes the relationship Spreewell is observing?

• Both the time he spends studying and his grade on the test are dependent variables

• The time he spends studying is an independent variable, but his grade on the test is a dependent variable

• Both the time he spends studying and his grade on the test are independent variables

• The time he spends studying is a dependent variable, but his grade on the test is an independent variable

Gideon's number of shells is 5 less than twice Vincent's number of shells. Let x represent Vincent's number of shells and y represent Gideon's number of shells. Which ordered pair (x,y) satisfies the equation y = 2x-5?

• (9,12)

• (6,7)

• (5,3)

• (7,10)

Jenny's age is 5 less than 4 times Matt's age. Lex x represent Matt's age, and let y represent Jenny's age. Which ordered pair (x,y) makes the equation y =4x-5 true?

• (9,33)

• (7,22)

• (6,17)

• (5,15)

Zach has 24 quarters to play games at a carnival. He only wants to play Ring Toss and Knock down the Clown. If each game costs 3 quarters, and he plays Ring Toss at least 3 times, how many different ways can Zach play the 2 games?

• 12 ways

• 8 ways

• 6 ways

• 4 ways

Ms. Wallace needs 45 juice boxes for a class trip. The juice boxes come in packages of 12. If Ms. Wallace already has 5 juice boxes, which equation would you use to find how many packages (p) she should buy?

• 45 + 12p = 5

• 12p - 5 = 45

• 12p + 5 = 45

• 12p - 45 = 5