Elevation above sea level and temperature are negatively-correlated variables. Which of the following statement describes the relationship between the variables?

A. As elevation decreases, temperature remains the same

B. As elevation decreases, temperature decreases

C. As elevation increases, temperature decreases

D. As elevation increases, temperature increases

Answer Explanation:

In a negatively-correlated variables, a change in one variable result in opposite change in the other variable. In other words, an increase in on variable results in a decrease in the other.

Now let’s analyze the given scenarios:

As elevation decreases, temperature remains the same this is NO-CORRELATION

As elevation decreases, temperature decreases is a POSITIVE CORRELATION

As elevation increases, temperature decreases is a NEGATIVE CORRELATION

As elevation increases, temperature increases is a POSITIVE CORRELATION

Therefore, the Correct Answer is C.

Q #1: Which of the following is 31% of 426?

A. 425.69

B. 132.06

C. 13.7

D. 0.07

Answer Explanation

First convert 31% to a decimal before working on the problem

31%=31/100=0.31

Thus, 31% of 426=0.31*426=132.06
Q #2: A gumball machine contains red, orange, yellow, green, and blue gumballs. Twenty percent of the gumballs are red, 30% are orange, 5% are yellow, 10% are green, and the rest are blue. If there are a total of 120 gumballs, how many more blue gumballs are there than yellow gumballs?

A. 48

B. 30

C. 42

D. 36

Answer Explanation

Determine the number of blue and yellow gumballs as follows:

Percent of blue gumballs=100%-(20%+30%+5%+10%) =100%-65%=35%

Number of blue gumballs35% of 120=0.55*120 = 42 blue gumballs [35%=35/100=0.35]

Number of yellow gumballs=5% of 120=0.05*120 = 6 yellow gumballs [5%=5/100=0.05]

Difference between the number of blue and yellow gumballs=42-6= 36 balls

Therefore, there are 36 more blue gumballs than yellow gumballs.
Q #3: Which of the following is the mostly likely weight of a pencil?

A. 25 kg

B. 25 cm

C. 25 mg

D. 25 g

Answer Explanation

The most likely weight of pencil is 25 g, because a pencil is a lighter object which is measured in grams.

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Elevation above sea level and temperature are negatively-correlated variables. Which of the following statement describes the relationship between the variables?

More Questions on TEAS 7 Math

Q #1: Which of the following is 31% of 426?

Answer Explanation

Q #2: A gumball machine contains red, orange, yellow, green, and blue gumballs. Twenty percent of the gumballs are red, 30% are orange, 5% are yellow, 10% are green, and the rest are blue. If there are a total of 120 gumballs, how many more blue gumballs are there than yellow gumballs?

Answer Explanation

Q #3: Which of the following is the mostly likely weight of a pencil?

Answer Explanation

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