Understanding Population Change

The video tutorial explains how to calculate the change, absolute change, and relative change in a population over time. It begins with a review of the concepts, highlighting that change can be positive or negative, while absolute change is always positive. The tutorial then explains how to express relative change as a percentage. An example is provided, showing a population decrease from 65,000 to 62,000, with calculations for absolute and relative changes. The video concludes with a discussion on vocabulary, emphasizing the importance of indicating whether changes are increases or decreases.

What is the initial population of the town in 2007?

• 6,200

• 65,000

• 65,800

• 62,000

How do you calculate the change between two quantities?

• Divide the starting quantity by the ending quantity

• Multiply the starting and ending quantities

• Subtract the starting quantity from the ending quantity

• Add the starting and ending quantities

What is the absolute change in the population from 2007 to 2010?

• 3,200

• 62,000

• 65,000

• 6,200

What is the absolute value of a negative change?

• A positive number

• A negative number

• Zero

• The same negative number

How is the relative change expressed?

• As a fraction

• As a decimal

• As a percentage

• As a whole number

What is the relative decrease in population expressed as a percentage?

• 4.9%

• 6.1%

• 3.2%

• 5.0%

What is the base of the percent change?

• The starting quantity

• The absolute change

• The average of starting and ending quantities

• The ending quantity

How do you convert a decimal to a percentage?

• Multiply by 10

• Divide by 100

• Multiply by 100

• Divide by 10

Why is it important to indicate whether a change is an increase or decrease?

• To calculate the absolute change

• To find the ending quantity

• To understand the direction of change

• To determine the starting quantity

If the percent change is negative, what does it indicate?

• A decrease

• A constant value

• No change

• An increase