Unit 6 Quiz 1

The Ecology Club was planning to take a field trip either to the seacoast or the mountains. The club president surveyed all of the members to determine the preferred trip. The results are displayed in the table.

Which statement is true about the results of the survey?

• 20% of eighth-grade students preferred the seacoast

• 32% of seventh-grade students preferred the mountains

• 40% of students preferred the mountains

• 48% of students preferred the seacoast

As part of a training program for a triathlon, Marcie completes a three-mile run a few times each week. The scatter

plot below shows the times in which Marcie completes this run for each week that she has been in the training

program.

Based on these data, which statement best describes the relationship between the number of weeks Marcie has

been in the training program and her running times?

• There is a negative linear association with no outliers.

• There is a negative linear association with one outlier.

• There is a positive linear association with no outliers.

• There is a positive linear association with one outlier.

In city W, the average cost for a gym membership is given by the equation y = 34.99x + 49, where y is the total cost, in dollars, for x months of membership. What is the meaning of the y-value when x = 1?

• the average sign-up fee for a gym membership

• the average monthly charge for a gym membership

• the average total cost for the first month of a gym membership

• the average total cost for the first two months of a gym membership

A newspaper conducted a survey to find out how many high school students play video games. The two-way table displays the data from the survey. Based on these data in the table, which statement is true?

• There were 2,451 boys surveyed, and about 29% of them play video games.

• There were 2,996 girls surveyed, and about 45% of them play video games.

• There were 5,447 students surveyed, and about 54% of them do not play video games.

• There were 2,493 students surveyed, and about 34% of them are girls who do not play video games.

The shoe sizes and the heights for 20 classmates were plotted as ordered pairs on a scatter plot. A line of best fit was drawn to model the data. Which scatter plot hows the most accurate line of best fit?

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Mr. Wallace surveyed 75 students at Poole Middle School to find out the students’ favorite place to eat lunch. The results are shown. Which table shows the approximate relative frequencies of Mr. Wallace’s data?

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A researcher studied the eyesight of people at different ages. She calculated a vision score for each person in the

study and plotted the data on the graph. The researcher used the line y = −0.1x + 110 to model the data. When she substituted the value x = 65 into this equation, what did the result tell her?

• the exact value for the vision score of a 65-year-old

• the predicted value for the vision score of a 65-year-old

• the minimum possible value for the vision score of a 65-year-old

• the maximum possible value for the vision score of a 65-year-old

Annette plans to visit an amusement park where she must pay for admission and purchase tickets to go on the rides. Annette wants to find the total cost for a day at the amusement park. She wrote the equation c = 1.50x + 12 to predict c, the total cost for a day at the amusement park. What could the number 12 represent in Annette’s equation?

• the number of rides

• the cost of admission

• the cost of each ticket

• the number of tickets

Which line represents the best fit for the scatter plot data?

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Extra Credit:

Name one thing that you are looking forward to in the near future.