Bird colonies Refer to Exercise 47.

(a) Use your calculator to make a residual plot. Describe what this graph tells you about the appropriateness of using a linear model.

(b) Which point has the largest residual? Explain what this residual means in context.

50. Do heavier people burn more energy? Refer to Exercise 48.

(a) Use your calculator to make a residual plot. Describe what this graph tells you about the appropriateness of using a linear model.

(b) Which point has the largest residual? Explain what the value of that residual means in context.