Get the Line of Best Fit from a Scatterplot

Which graph shows a line of best fit for the scatterplot?

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For which scatterplot would the line of best fit be represented by the equation:

y=1/2 x +2?

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A group of friends recorded the time it took to ride their bikes around the park. The scatterplot shows their results with the line of best fit.

Using the line of best fit, which is closer to the number of minutes it would take to complete 9 laps?

• 4

• 5

• 6

• 7

Oren plants a new vegetable garden each year for 14 years. The scatterplot shows the relationship between the number of seeds he plants and the number of plants that grow. Which number best represents the slope of the line of best fit through the data?

• -10

• -1/10

• 1/10

• 10

Which equation could describe the line of best fit for the graph?

• y = 5x + 236

• y = -5x + 236

• y = 1/5 x + 236

• y = -1/5 x + 236

The scatterplot shows the relationship between the number of bags of popcorn that are sold and the price per bag.

Which of these graphs shows the line of best fit?

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A researcher gathered data to predict the number of new types of plants (y) that will be in a state park after x years. After making a scatterplot of the data, she determined the equation of a line of best fit. The equation is shown below.

y = 0.25x+8

Based on the equation, what is the number of new types of plants that will be in the park after 24 years?

• 8

• 14

• 32

• 64

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade. 

• No relationship exists between the number of books students read and their English grades.