which type of relationship is indicated by the residual plot?\na linear relationship\nb quadratic…

Brief Explanations:

In a residual plot for a linear - fit, the residuals should be randomly scattered around the horizontal axis. Here, the residuals do not show a random scatter pattern. Instead, there is a non - random pattern (e.g., a curve - like behavior in the distribution of points), which indicates that the relationship is non - linear. A linear relationship would have residuals randomly distributed above and below the zero line. Quadratic and exponential are types of non - linear relationships, but just from the residual plot, we can only say it's non - linear in general.

Answer:

C. non - linear relationship