56. Do heavier people burn more energy? Refer to Exercise$54.$
(a) Use your calculator to make a residual plot. Describe what this graph tells you about how well the line fits the data.
(b) Which point has the largest residual? Explain what the value of that residual means in context.

A residual plot is a graphic tool for determining the relationship between a transmitted independent variable and the retort variable when multiple independent variables are used.

The difference between the actual and expected values called the residual. The horizontal axis contains the mass, and the vertical axis contains the residuals.

In statistics, residual values direct the portion of the variability in a dependent variable fragment that is left after the forecasters have accounted for the variability described in the investigation.

The table shows the values of predicted and residuals:

From the above table, the point $(42,1418)$has the largest residual. Hence, the point deviate greatly from a line, it is an outlier.