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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?

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.

More Questions on TEAS 7 Math

  • Q #1: A consumer makes a $400 down payment on a television that costs $1,570. Which of the following is the number of months it will take to pay off the television with monthly payments of $100? (Assume that no interest is owed)

    A. 12

    B. 16

    C. 15

    D. 11

    Answer Explanation

    Hire purchase cost=down payment + total monthly installment

    Total monthly payment=hire purchase cost-down payment= $(1570-400)=$ 1170

    Number of months=total monthly payment/monthly payment=$1170/$100=11.7 months

    The consumer will clear the balance in 12 months.

  • 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: In a study of the average weight of babies at different time intervals after birth, the babies’ measured weight is which of the following variables?

    A. Independent

    B. Control

    C. Dependent

    D. Constant

    Answer Explanation

    In this case, we are measuring average weight of the babies with time. The weight of the babies will vary with time, meaning when we vary time, the average weight of the babies will be different. Here, time is independent while average weight is dependent variable.