SGM - 8.5D Trend Lines

1. A group of friends recorded the time it took to ride bikes around the park. The scatterplot below shows their results with a trend line. Using the trend line, which is closest to the number of minutes it would take to complete 9 laps?

• 4
• 5
• 6
• 7

2. The scatterplot records the number of shots on goal attempted by eight members of a hockey team, and the number of goals made. Use the trend line to predict the number of goals made for 26 attempts.

• 8
• 11
• 14
• 15

3. Which of the following are true about fitting a trend line to data in a scatterplot? Select TWO responses.

• The trend line should go in the direction of the data.
• The trend line should connect all the data points.
• The trend line should be drawn above the data points.
• The trend line should be drawn between the data points.

4. Which trend line best fits the data?

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5. The local ice cream shop keeps track of how much ice cream they sell versus the noon temperature on that day. It is now easy to see that warmer weather leads to more sales, but the relationship is not perfect. Because the data is not perfect we use a trend line to follow the pattern and make predictions. If the temperature is 21 degrees Celsius (approximately 70 degrees Fahrenheit) how much ice cream sales can the ice cream shop expect to make?

• $400
• $425
• $475
• $500

6. Lily is getting trained for a 10K race. For some of her training runs, she records the distance she ran and how many minutes she ran as shown in the graph. A trend line is drawn to show the relationship between distance and time. Use the trend line to predict Lily's distance if she runs for 45 minutes.

• 5.0 miles
• 4.5 miles
• 4.0 miles
• 3.5 miles

7. Based on the scatterplot, what is the best prediction of a person's average words per minute if the person has spent 70 hours learning to type?

• 33 words per minute
• 50 words per minute
• 65 words per minute
• 85 words per minute

8. Based on the scatterplot, what is the best prediction of a person's average words per minute if the person has spent 15 hours learning to type?

• 35 words per minute
• 30 words per minute
• 20 words per minute
• 0 words per minute

9. A graph of a set of data points is shown below. The trend line for the data is shown on the grid. Using the trend line, what is the best prediction of the value of y when x=18?

• 17
• 13
• 15
• 9

10. The graph below shows the number of students who wore shorts to school at different temperatures.If 200 students wore shorts to school, which is the best prediction of the temperature?

• 88 Degrees
• 83 Degrees
• 86 Degrees
• 90 Degrees