Page 139 - IM_Algebra1_FL Print Sample.pdf

5.3 Fitting Lines with Technology
15 minutes
It is recommended to use the digital version of this activity. The mathematical purpose of this activity is for students to use technology to compute a line of best t for data in a table, and to understand the meaning of the slope and -intercept.
Instructional Routines
• Fit it
Plot It indicates activities where students have an opportunity to use a table of points to produce a graph to see patterns and make predictions. Also when appropriate, nd a function that best ts the data.
Launch
Provide data tables for the graphs for the cards from the previous activity. Assign one table to each group. For students using the paper task, show them how to use technology to create a scatter plot of the data in a table. After groups have had a chance to estimate the best t lines, pause the class. Show students how to use technology to nd the least squares regression line for data and display the line with the scatter plot.
Display the tables for students to use for the last question:
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Teacher Guide Algebra