Which of the following residual plots would indicate that a least squares regression line ($LSRL$) is an appropriate model for the data?

"Graphical Analysis In Exercises 1–3, use the figure.

Describe the unexplained variation about a regression line in words and in symbols."

In the context of regression analysis, what is a residual, and what does it indicate when a residual is positive? (A residual is typically defined as $e=y-\hat{y}$, where $y$ is the observed value and $\hat{y}$ is the predicted value.)

In the context of residuals analysis, what does a residual value of $-0.8$ indicate about a data point relative to the line of best fit?

Which of the following patterns in a residual plot indicates that the line of best fit is appropriate for the data?

In the context of regression analysis, what is a residual, and under what condition is a residual considered positive?

In the context of regression analysis, what is a residual, and what does it indicate when a residual is positive? (A residual is typically defined as $e=y-\hat{y}$, where $y$ is the observed value and $\hat{y}$ is the predicted value.)

In the context of regression analysis, what is a residual, and what does it indicate when a residual is positive? (A residual is typically denoted as $e$, where $e=y-\hat{y}$, with $y$ as the observed value and $\hat{y}$ as the predicted value.)

In the context of residuals analysis, what does it mean if a data point has a residual value of $1.3$ with respect to the line of best fit for a data set?