Chapter 8.1, Problem 26E

a.

To determine

To draw:

A graph for each relation given by ordered pairs (age, mass). Draw both graphs is the same coordinate plane, and use a different color for each graph.

Answer to Problem 26E

Our required graph would look like:

  

Explanation of Solution

Given:

The brown-headed cow bird does not raise its own offspring. It lays eggs in nests of other bird species, which then hatch the eggs and raise the young. A scientist investigated whether the growth of a young cowbird is affected by the species of bird that raises it. The scientist’s results for two bird species are shown below:

  

Calculation:

We will use red color for data about cowbird raised by red-eyed Vireo and blue color for data about cowbird raised by blue-gray Gnatcatcher.

Upon graphing our given data, we will get our required graph as shown below:

  

b.

To determine

To compare:

The graphs from part (a). How is a cowbird’s growth when raised by a red-eyed vireo like its growth when raised by a blue-grey gnatcatcher? How is its growth different?

Answer to Problem 26E

Initially the growth of a cowbird raised by blue-grey gnatcatcher is greater than the growth of a cowbird raised by red-eyed vireo.

Explanation of Solution

Given:

The brown-headed cow bird does not raise its own offspring. It lays eggs in nests of other bird species, which then hatch the eggs and raise the young. A scientist investigated whether the growth of a young cowbird is affected by the species of bird that raises it. The scientist’s results for two bird species are shown below:

  

Calculation:

We can see from the graph that for two days the growth of a cowbird raised by blue-grey gnatcatcher is likethe growth of a cowbird raised by red-eyed vireo.

After 4 days the growth of a cowbird raised by red-eyed vireois greater than the growth of a cowbird raised by blue-grey gnatcatcher.