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High school statistics

Unit 4: Lesson 2

Analyzing trend lines in scatterplots

Interpreting slope of regression line
Interpreting y-intercept in regression model
Interpreting slope and y-intercept for linear models
Equations of trend lines: Phone data
Example: Correlation coefficient intuition
Correlation coefficient intuition
Correlation and causality

Interpreting slope and y-intercept for linear models

AP.STATS: DAT‑1 (EU), DAT‑1.H (LO), DAT‑1.H.2 (EK), DAT‑1.H.3 (EK) CCSS.Math: 8.SP.A.3, HSS.ID.C.7

Julio distributed a survey to his fellow students asking them how many hours they spent playing sports in the past day. He also asked them to rate their mood on a scale from 0 to 10, with 10 being the happiest. Julio created the following scatterplot and regression line to show this relationship.

The fitted line has a y-intercept of 5.

What is the best interpretation of this y-intercept?

Stuck?

High school statistics

Unit 4: Lesson 2

Problem