Understanding Obesity Trends in the U.S.

The video tutorial explains a formula modeling the percentage of U.S. adults considered obese based on years after 1985. It demonstrates how to calculate the obesity rate for 2007 using the formula and a calculator. Additionally, it shows how to determine the year when the obesity rate will reach 40% by solving the equation. The tutorial concludes with a summary of the calculations and findings.

What does the variable X represent in the formula Y = 3.1 x √X + 17?

• The number of years after 1985

• The base year

• The percentage of obese adults

• The obesity rate in 1985

In the formula Y = 3.1 x √X + 17, what does Y represent?

• The percentage of obese adults

• The base year

• The obesity rate in 1985

• The number of years after 1985

How do you calculate the value of X for the year 2007?

• Divide 2007 by 1985

• Multiply 1985 by 2007

• Subtract 1985 from 2007

• Add 1985 to 2007

What is the approximate percentage of obese adults in 2007 according to the formula?

• 40.2%

• 31.5%

• 35.7%

• 25.4%

What is the first step in solving for the year when obesity will reach 40%?

• Subtract 17 from both sides

• Multiply both sides by 3.1

• Add 17 to both sides

• Divide both sides by 3.1

After isolating the square root of X, what is the next step?

• Multiply both sides by 3.1

• Add 17 to both sides

• Subtract 17 from both sides

• Square both sides

What is the approximate value of X when the obesity rate is 40%?

• 40

• 7.419

• 55

• 22

How do you find the actual year when the obesity rate will be 40%?

• Add 55 to 1985

• Subtract 55 from 1985

• Multiply 55 by 1985

• Divide 1985 by 55

What year is predicted for the obesity rate to reach 40%?

• 2025

• 2050

• 2030

• 2040

What is the base year used in the formula?

• 1990

• 1975

• 1985

• 2000