Line of Best Fit Practice

What does the value, r= -0.89, tell us about the linear relationship of two quantitative variables?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

In the scatter plot, does the image shows a "Line of Best Fit"?

• Yes

• No

Tags

CCSS.8.EE.B.5

Which of the following would be the most accurate equation for the scatter plot?

• y = -2x - 7

• y = -x + 7

• y = 3x + 7

• y = 15x + 7

Tags

CCSS.8.EE.B.5

What are the coordinates of the outlier?

• (1,9)

• (9,1)

• (2,2)

• y=x

Q1. What is the trend observed in the data?

• A) positive trend

• B) negative trend

• C) no trend

The scatterplot below suggests which of the following types of data relationship?

• Weak, negative

• weak, positive

• strong, negative

• strong, positive

Tags

CCSS.HSF-LE.A.1B

The graph above shows a line of best fit for data collected on the amount earned by waiters and waitresses last week in relation to the number of tables they served.  What is the equation of the line of best fit?

• y = (5/3) x + 375

• y = (1/3) x + 475

• y = (5/3) x + 475

• y = (1/3) x + 375

Tags

CCSS.HSF.LE.B.5

Looking at the graph showing a line of best fit, what is the correlation shown?

• Length of life is constant

• Length of life increases as amount of sunlight increases

• Length of life increases as amount of sunlight decreases

• Length of life decreases as amount of sunlight increases

What the y-intercept for the line of best fit for the scatter plot?

• 35

• 50

• 30

• 20

Tags

CCSS.8.EE.B.5

A small theme park is trying to determine the number of guests they should expect on a weekend, based on the temperature outside.  Based on the trend line, about how many guests should be expected if the temperature is around 80°?

• 8,300

• 8

• 7,300

• 9,300