Solve It! The table shows the number of digital albums downloaded per year and the number of CDs sold by manufacturers per year. What relationship exists between the two sets of data? In other words, as the number of downloads increases, is there a predictable change in the other?
You may use Desmos Graphing Calculator to answer the questions.
Solve It! Predict the number of CDs sold and the number of albums downloaded in 2010. Explain your reasoning.
Problem 1 Got It? What type of relationship does the scatter plot you created in the previous item show?
What does it mean if the correlation coefficient (r) of a data set is close to 1? You may use the canvas to help illustrate your written response.
What does it mean if the correlation coefficient of a data set is close to 0?
Make a scatter plot of the data.
Draw an appropriate trend line,
Write an equation of the trend line.
Be sure to include relevant graph detail: label axes, indicate units and scale on both axes, and use arrows to represent end behavior, as appropriate.
Consider your scatter plot and the data in the previous item. What type of relationship is shown?
Consider your scatter plot and the data once more. Predict the average maximum daily temperature in January at a latitude of 50° N.
Choose the most reasonable prediction.
Create a scatter plot that represents the data and draw the trend line.
YOU CAN CREATE ON DESMOS AND NOT HERE.
Describe the correlation (strength and direction) of the scatter plot above.
What does the slope of the trend line tell you about the relationship between the variables (interpret the slope)?
Create a scatter plot that represents the data and draw the trend line.
(you may copy and paste from Desmos)
Describe the correlation (strength and direction) of the scatter plot above.
What does the slope of the trend line tell you about the relationship between the variables (interpret the slope).
Find the slope of the trend line. Show your work below.
Predict a student's grade if they are absent 8 days.
Find the slope of the trend line. Show your work below.
Predict what the admission price would be in order for the museum to reach 120 visitors.
