Sample Linear Regression PlotLinear Regression Plot
The Linear Regression Plot is a dual scatter plot of both data points and linear regression lines.
Plus signs
Plus (+) signs represent actual data points
Green plus signs represent the lab versus standard concentration data
Blue plus signs represent the lab versus group data
Triangles
Triangles represent means or standard concentrations.
Red triangles along the y-axis represent lab means
Blue triangles along the x-axis represent group means
Green triangles along the x-axis represent standard concentrations
Lines
Green lines represent the lab versus standard concentration data
Blue lines represent the lab versus group data
Dashed lines represent your specified tolerance limits
The dashed lines parallel to both axes are a measure of linearity and provide a quick visual representation of the linearity of the lines. A line with perfect slope (1.0) and intercept (0) would intersect the right angles of each line.