MA19.8.19

Mathematics (2019) Grade(s): 8

MA19.8.19
Given a scatter plot that suggests a linear association, informally draw a line to fit the data, and assess the model fit by judging the closeness of the data points to the line.

Unpacked Content

Knowledge

Students know:

Patterns found on scatter plots of bivariate data, (linear/non-linear, positive/negative).
Strategies for informally fitting straight lines to bivariate data with a linear relationship.
Methods for finding the distance between two points on a coordinate plane and between a point and a line.

Skills

Students are able to:

Construct a scatter plot to represent a set of bivariate data.
Use mathematical vocabulary to describe and interpret patterns in bivariate data.
Use logical reasoning and appropriate strategies to draw a straight line to fit data that suggest a linear association.
Use mathematical vocabulary, logical reasoning, and closeness of data points to a line to judge the fit of the line to the data.

Understanding

Students understand that:

Using different representations and descriptors of a data set can be useful in seeing important features of the situation being investigated.
When visual examination of a scatter plot suggests a linear association in the data, fitting a straight line to the data can aid in interpretation and prediction.

Vocabulary

Scatter plot
Linear association
Quantitative variable

Aligned Learning Resources

Drawing Conclusions and Comparing/Contrasting - The Everglades

Greek and Latin Science Root Words

Design by Adaptive Theme