Understanding Sales Tax Calculations

The video tutorial explains the concept of tax using the example of purchasing sunglasses. It details how tax is calculated as a percentage of the purchase price, using a rate of 4.5%. The tutorial introduces the equation y = KX, where K is the tax rate, X is the price, and Y is the tax amount. It also explains how to convert the tax rate into a percentage and provides a visual diagram to aid understanding.

What is the initial cost of the sunglasses before tax?

• $9.55

• $10.00

• $10.45

• $11.00

How much tax is added to the $10 purchase of sunglasses?

• $0.50

• $0.35

• $0.45

• $0.40

What is the tax rate applied to the purchase of the sunglasses?

• 3.5%

• 5.0%

• 4.0%

• 4.5%

How is the tax rate expressed as a decimal?

• 0.005

• 0.45

• 0.0045

• 0.045

In the equation y = KX, what does 'K' represent?

• Discount rate

• Number of items

• Tax rate

• Total cost

What does 'X' represent in the equation y = KX?

• Discount rate

• Number of dollars spent

• Total cost

• Tax amount

How is the tax rate of 4.5% expressed in terms of dollars per hundred dollars?

• $4.00

• $4.50

• $5.00

• $5.50

What is the total cost of the sunglasses including tax?

• $10.50

• $11.00

• $10.45

• $10.00

How is the tax rate of 4.5% described in terms of cents per dollar?

• 5.0 cents

• 4.5 cents

• 4.0 cents

• 3.5 cents

What is the purpose of tax as explained in the video?

• To fund government activities

• To increase product prices

• To provide discounts

• To reduce inflation