Select all statements that are true about a linear relationship between a response

Select all statements that are true about a linear relationship between a response variable and an explanatory variable . The value of represents the slope of the least-squares regression line.

The relationship can be expressed mathematically in the form =+ where and are constants.

The residual plot based upon the least-squares regression line shows a U-shaped leftover pattern.

The scatter plot looks like a straight line.

The -intercept is the value of when =0 .