4-5 (draft)

Lydia graphs how much money she earns for walking different numbers of dogs. She draws a line through the data and sees that it passes through the ordered pairs (2, 5) and (5, 12.50), where x is the number of dogs and y is her earnings in dollars. Select the best description of the slope of the linear relationship.

• Lydia earns $2.50 per dog.

• It takes Lydia 2.5 hours to earn $10.

• Lydia earns $0 for walking 0 dogs.

• Lydia earns $5 for walking 2 dogs.

The values in the table represent the cost of renting a jet ski, where x is the number of hours of the rental and y is the total cost. Select a true statement.

• The slope represents a rental rate of $60 per hour.

• The slope represents a fixed fee of $30.

• The y-intercept represents a rental rate of $15 per hour.

• The y-intercept represents a fixed fee of $30.

• The y-intercept of the line is 5.

• The y-intercept of the line is 19.

• The y-intercept of the line is 25.

• The y-intercept of the line is 95.

• The number of weeks

• The total amount saved

• The starting balance

• The amount saved per week

• The rate of tire wear

• The initial tread thickness

• The distance driven

• The average tread thickness of a used tire

If Lydia walks 4 dogs, how much will she earn according to the linear relationship described?

• $5

• $10

• $7.50

• $12.50

What is the slope of the line that passes through the points (2, 5) and (5, 12.50)?

• 2.5

• 3

• 2

• 1.5

If the cost to rent a jet ski for 3 hours is $90, what is the rental rate per hour?

• $30

• $20

• $25

• $15

What is the equation of the line that represents Lydia's earnings for walking dogs?

• $250

• $400

• $425

• $500