Delany wants to find out the way her friends are spending their summer vacation. She surveys a large number of students at a mov
ie theater about their favorite summer activity. The results of her survey are shown on the table below.
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Delany bases her conclusion on the results of her survey. She concludes that the favorite summer activity of most students is watching movies. Which statement best describes Delany's conclusion?
A.Delany's conclusion is not valid because she surveyed only students.
B.Delany's conclusion is valid because she surveyed a large number of students.
C.Delany's conclusion is valid because she surveyed students from many schools.
D.Delany's conclusion is not valid because she surveyed students at a movie theater.
Forever 21 is a local clothing store for teens. On Saturday a journalist for a teen magazine surveyed teenagers leaving this clothing store to determine which brand of clothing they like best. Which statement best explains why the results of this survey may not be valid?
A.The survey could have been conducted online.
B.The group surveyed consisted only of teenagers
C.The survey was conducted by a journalist from only one magazine.
D.The group surveyed consisted only of teenagers who shopped at the Forever 21.
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Delany bases her conclusion on the results of her survey. She concludes that the favorite summer activity of most students is watching movies. Which statement best describes Delany's conclusion?
A.Delany's conclusion is not valid because she surveyed only students.
B.Delany's conclusion is valid because she surveyed a large number of students.
C.Delany's conclusion is valid because she surveyed students from many schools.
D.Delany's conclusion is not valid because she surveyed students at a movie theater.
Forever 21 is a local clothing store for teens. On Saturday a journalist for a teen magazine surveyed teenagers leaving this clothing store to determine which brand of clothing they like best. Which statement best explains why the results of this survey may not be valid?
A.The survey could have been conducted online.
B.The group surveyed consisted only of teenagers
C.The survey was conducted by a journalist from only one magazine.
D.The group surveyed consisted only of teenagers who shopped at the Forever 21.
1 answer:
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We have to identify the rational function among the given functions.
Rational function is a function that is the ratio of two polynomials. It is rational because one polynomial is divided by the other polynomial, like a ratio.
1. Consider the first function , since it is not a function that is the ratio of two polynomials. So, it is not a rational function.
2. Consider the second function , since it is not a function that is the ratio of two polynomials. So, it is not a rational function.
3. Consider the third function , since it is not a function that is the ratio of two polynomials. So, it is not a rational function.
4. Consider the fourth function , since it is a function that is the ratio of two polynomials (x+2) and (5x). So, it is a rational function.
So, Option D is the correct answer.