Scatterplots Application

A convenience store manager notices that sales of soft drinks are higher on hotter days, so he assembles the data in the table shown. Using your desmos calculator, find the equation of the line of the best fit: y =

Which of the following best shows the correlation coefficient and the equation for the line of best fit for the data in the table?

The table shows the number x of teachers and the number y of students in each of several schools.

The equation of the best fit line is:

y =

The table shows production costs for building different numbers of skateboards. What is the correlation coefficient?

Mathematical Equivalence

ON

Choose the best description for the relationship between the two sets of data in the scatter plot.

• Strong positive association

• Strong negative association

• Weak positive association

• Weak negative association

The table shows the number of yo-yo's sold in the thousands for the years between 2010 and 2017.

What is the line of best fit for the data?

y =

Anthropologists use a linear model that relates femur length to height. The model allows an anthropologist to determine the height of an individual when only a partial skeleton (including the femur) is found.

The equation of the line of best fit is: y =

The table shows the number x of teachers and the number y of students in each of several schools.

What is the correlation coefficient?

Mathematical Equivalence

ON

What does the correlation coefficient tell us about the data?

• The data has a strong positive correlation

• The data has a weak positive correlation.

• The data has a strong negative correlation.

• The data has a weak negative correlation.

• The data has no correlation.

What kind of correlation does the "r" value suggest exists between these variables?

• strong negative correlation

• weak negative correlation

• no correlation

• strong positive correlation

• weak positive correlation