Chapter 4, Problem 4.59RE

(a)

To determine

To find out from the graph the approximate body weight and brain weight for dolphin and hippopotamus.

Answer to Problem 4.59RE

The body weight of a dolphin is about $180$ kilograms and its brain weigh is about $1600$ grams.

The body weight of a hippopotamus is about $1400$ kilograms and its brain weigh is about $600$ grams.

Explanation of Solution

The coordinates of the point dolphin are about ( $180,1600$ ) and thus the body weight of a dolphin is about $180$ kilograms and its brain weigh is about $1600$ grams.

The coordinates of the point hippo are about ( $1400,600$ ) and thus the body weight of a hippopotamus is about $1400$ kilograms and its brain weigh is about $600$ grams.

(b)

To determine

To find out the feature of the plot behind the reaction “Dolphins are smart and Hippos are dumb”.

Explanation of Solution

The feature of the plot is that a high proportion of brain weight to body weight means smart and a low proportion of brain weight to body weight means dumb.