Math Positive Negative Correlations

The table shows the hours worked by students with after-school jobs and their math averages.

Which statement is true about this data set?

• As hours worked increase, math averages increase.

• As hours worked decrease, math averages increase.

• As hours worked increase, math averages stay the same.

• There is no relationship between hours worked and math averages.

Which scenario would most likely have a scatterplot showing no or very weak association between the quantities?

• outside temperature and number of people wearing wool hats

• amount of gas in a car and the weight of the gas in the car

• hours traveled in a car at a constant speed and the total distance traveled

• the day of the month on which a puppy is born and the puppy’s birth weight

Which scatterplot best shows a strong linear relationship?

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A class created a scatterplot by looking at the predicted temperature vs. the actual temperature for their city for 30 days. The result formed a strong positive correlation, with the exception of one outlier. Which would most likely cause the outlier?

• A moderate predicted temperature and a very high actual temperature

• A moderate actual temperature and a moderate predicted temperature

• A very high predicted temperature and a very high actual temperature

• A low actual temperature and a low predicted temperature

The graph shows the time, in minutes, that students spent studying for a math exam and their scores. What point is the outlier?

• (0, 70)

• (10, 98)

• (60, 96)

• (98, 10)

This scatterplot compares the weight and the age of children. What type of association is shown in the scatterplot?

• positive, linear

• negative, linear

• positive, nonlinear

• negative, nonlinear

Kyla recorded her grades in math for four weeks and the number of texts she sent each week in this table. What type of association exists between Kyla's grades and the number of texts she sent each week?

• no association

• positive association

• negative association

• irrational association

This scatterplot shows temperatures throughout the day. Which choice describes the data in the scatterplot?

• negative cluster with one outlier

• positive cluster with one outlier

• negative cluster

• positive cluster

Which statement BEST describes the relationship shown in the graph?

• As more cakes are made, more sugar is used.

• Cakes need a lot of sugar.

• Cakes are too sweet.

• Larger cakes use more sugar than smaller cakes.

A random group of 12 people were asked how many hours per week they watched TV and how tall they are in inches. The findings are shown in the scatterplot below.

• Everyone watches some TV each week.

• As a person’s height increases, the number of hours of TV watched increases.

• As a person’s height decreases, the number of hours of TV watched increases.

• There is no relationship between hours of TV watched and a person’s height.