A group of Marine Biologists was study sand sharks and recorded the length in inches and weight in lbs for each shark they were able to trap during a certain week. After the measurements were taken, the data was recorded in the table below and the sharks were tagged and released.

Question

1.
create a scatter plot for the data. Be sure to set the x-axis and y-axis values and steps appropriately so you can see the data. When you have finished take a snapshot of your graph and paste it into the essay space below.

2.
Find the Line of Best Fit for the data you have plotted. Type the equation in the space provide below using the equation tool. You may round the slope and y-intercept values to the nearest tenth.

3.
The slope of the Line of Best Fit, rounded to the nearest tenth is

Using the graph and equation that you have found, answer the following questions about the sand shark population data.
4.
Describe the correlation between a typical sand shark's length and weight.

5.
Using the equation you created, predict the weight of a sand shark that is 75 inches long. Please use the drawing tool to show your work for how you have found your answer. You may also type an answer or write your work on a sheet of paper and submit the picture in the essay space.

6.
One of the sharks collected was 67 inches long and weighed 170 pounds. The scientists decided to leave this data out of the set. Why do you think they did this?

7.
Sand Sharks can only reproduce when they are at least 135 lbs in weight. At what length would scientists expect a shark to reach this mature weight? Please use the equation you generated to find this answer and show your work. Round your answer to the nearest tenth.

8.
Why might scientists analyze data like this? Think of at least two reasons and write your answer in complete sentences.

answer all 8 questions as a 7 year old and 1 sentence

Answer 1

1. I can't make a scatter plot, but I can tell you to put the lengths on the bottom and the weights on the side, then plot the points!

2. The line of best fit looks like y = 2.2x - 45.0.

3. The slope of the line of best fit is 2.2.

4. If a sand shark is longer, it usually weighs more, which means there's a good connection.

5. If a sand shark is 75 inches long, I think it would weigh about 150 pounds because I used the equation.

6. They might have left out the shark because it was much heavier than the others, which is called an outlier!

7. To find out when a shark will be 135 pounds, I would use the equation and get around 82 inches long.

8. Scientists look at this data to learn how big sand sharks get and to help keep the sharks safe in the ocean!