Mrs. Bobby introduces Lesson 13, focusing on ratio tables and variables. The lesson explains how variables represent unknown numbers and how to use ratio tables to solve problems. It covers modeling relationships with equations and explores different ways to represent these equations. The lesson concludes with applying these concepts to real-world problems and a personal note from the teacher.

What is a variable in the context of this lesson?

• A fixed number

• A mathematical operation

• A letter representing a mystery number

• A type of vehicle

If Malia sees 18 cars and 6 trucks, what is the ratio of cars to trucks?

• 3:1

• 18:6

• 6:18

• 1:3

How do you find the number of cars if you know the number of trucks?

• Multiply the number of trucks by 3

• Add 3 to the number of trucks

• Divide the number of trucks by 3

• Subtract 3 from the number of trucks

What is the value of the ratio of cars to trucks?

• 1:2

• 2:1

• 3:1

• 1:3

Which of the following is NOT a correct way to express the ratio of cars to trucks?

• 3 to 1

• 3:1

• 1:3

• 3/1

What is the inverse operation of multiplication used in the lesson?

• Subtraction

• Addition

• Exponentiation

• Division

Which of the following is an equation that models the relationship between cars (C) and trucks (T)?

• C = 3T

• C = T / 3

• C = T + 3

• C = T - 3

What does the coefficient in the equation C = 3T represent?

• The number of cars

• The multiplier for trucks to get cars

• The divisor for cars to get trucks

• The number of trucks

If there are 1254 trucks, how many cars are there according to the ratio?

• 2510

• 3762

• 1254

• 418

What operation would you use to find the number of trucks if you know the number of cars?

• Multiply by 3

• Subtract 3

• Add 3

• Divide by 3