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

Understanding Obesity Trends in the U.S.

Interactive Video
•
Mathematics, Science
•
7th - 10th Grade
•
Hard

Liam Anderson
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The number of years after 1985
The base year
The percentage of obese adults
The obesity rate in 1985
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the approximate percentage of obese adults in 2007 according to the formula?
40.2%
31.5%
35.7%
25.4%
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the approximate value of X when the obesity rate is 40%?
40
7.419
55
22
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