Determining the Best Deal: Comparing Equations for Proportional Relationships

This video tutorial explains how to determine the best deal by comparing equations that represent proportional relationships between total cost and the number of items. It covers the concept of unit cost, how to calculate it, and how to write equations for proportional relationships. The tutorial also includes a comparison of unit costs using a candy example and demonstrates how to graph data to visualize these relationships.

What is the main focus when determining the best deal in a proportional relationship?

• The total number of items

• The total cost

• The constant proportionality or unit cost

• The dependent variable

How do you calculate the unit cost of an item?

• By multiplying the total cost by the number of items

• By subtracting the number of items from the total cost

• By dividing the total cost by the number of items

• By adding the total cost and the number of items

If two bikes cost $150, what is the unit cost of one bike?

• $50

• $75

• $100

• $150

Which candy has the lowest unit cost if Candy A is 1/10, Candy B is 2/100, and Candy C is 3/100?

• Candy C

• Candy A

• Candy B

• All have the same unit cost

What does a steeper slope in a graph of cost versus items indicate?

• No change in unit cost

• A higher unit cost

• A constant unit cost

• A lower unit cost