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Copy of Session 4 Practice Analyzing the Line of Best Fit (1/22/2026)

Last updated 30 days ago

6 questions

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1

1

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2

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Question 1

1.

A scientist is studying the effect of rainfall on the height of a certain species of sunflower. The scatter plot shows the results. What conclusion does the data support?

If the rainfall is less than 2 centimeters, then this species of sunflower can still reach its maximum height.

This species of sunflower will not grow over 8 feet high.

With over 4.0 centimeters of rain per week, this species of sunflower will grow over 12 feet high.

This species of sunflower grows tallest when there are between 2.5 and 3 centimeters of rain per week.

Question 2

2.

While studying medical treatments, scientists noticed a relationship between two of the treatments when applied together. As Treatment X became more effective, Treatment Y became less effective.

Which scatter plot best demonstrates this relationship?

Table A

Table B

Table C

Table D

Question 3

3.

A scatterplot is shown on the graph below.
Which of these could be the line of best fit?

y = x + 100

x = 100

y = 100

y = x – 100

Question 4

4.

The scatter plot below shows the average yearly income based on age.
Using the information provided in the scatter plot, state the coordinates of the outlier and explain why this point is an outlier.

(12.5, 28) is the outlier.  The outlier is located inside the general shape of the data.

(28, 12.5) is the outlier. The outlier is located away from the general shape of the data.

(32, 35) is the outlier. The outlier is located inside the general shape of the data.

(35, 32) is the outlier. The outlier is located away from the general shape of the data.

Question 5

5.

Marcie heated a beaker of water in science class. The scatter plot below shows the temperature (y), in degrees Celsius, of the water based on the number of minutes (x) she heated the water.

The line of best fit for this data is y = 5.3x + 23. Use this equation to make a prediction about the temperature of the water in the beaker if heated for 6 minutes. Show your thinking.

Question 6

6.

Marcie heated a beaker of water in science class. The scatter plot below shows the temperature (y), in degrees Celsius, of the water based on the number of minutes (x) she heated the water.

The line of best fit for this data is y = 5.3x + 23. What is the y-intercept in the line of best fit? What does the y-intercept represent in the scatter plot in context of the problem?