The video tutorial introduces Unit 5, focusing on modeling linear relationships. It explains how linear equations represent relationships between variables and demonstrates solving problems using these models. The tutorial includes examples and practice problems to reinforce learning, emphasizing the importance of understanding linear equations in real-world applications.

What is the main focus of the lesson introduced in the video?

• Quadratic equations

• Statistics

• Linear relationships

• Geometry

Which of the following represents a linear equation?

• y = 2x^2 + 3

• y = 3x + 5

• y = 4/x

• y = x^3 - 2

In the example of Joe saving for shoes, what is the initial amount he has saved?

• $0

• $50

• $30

• $100

How much does Joe earn per hour from babysitting?

• $10

• $5

• $8

• $12

At what number of students do the costs of the two bus companies become equal?

• 16 students

• 10 students

• 25 students

• 20 students

Which company is more cost-effective for a small class size?

• Neither

• Company A

• Company B

• Both are the same

What is the flat fee for the phone plan discussed in the video?

• $60

• $50

• $70

• $80

How much is charged per extra gigabyte in the phone plan?

• $4

• $6

• $3

• $5

Which line represents the phone plan cost in the graph?

• Line A

• Line B

• Line D

• Line C

What is the slope of the line representing the phone plan cost?

• 3

• 5

• 4

• 6