Linear Models for Two-Variable Data

What is the purpose of a scatterplot in data analysis?

• To solve linear equations

• To list data in a table

• To display a single value

• To visualize the relationship between two variables

Tags

CCSS.6.EE.B.6

What does the line of best fit represent?

• The strongest data point

• The general trend in the data

• The highest y-value

• The midpoint of the x-values

Tags

CCSS.HSF.LE.B.5

Which equation form represents a linear model?

Tags

CCSS.8.F.A.3

What does the slope in a linear model indicate?

• The initial value of y

• The rate of change between variables

• The midpoint of data points

• The highest data value

Tags

CCSS.8.EE.B.5

If a scatterplot shows a downward trend, what is the slope of the line of best fit?

• Positive

• Zero

• Negative

• Undefined

Tags

CCSS.8.EE.B.5

A scatterplot shows study hours vs. test scores. What is the independent variable?

• Test scores

• The line of best fit

• The slope

• Study hours

Tags

CCSS.8.EE.B.5

How do you determine the slope of the line of best fit from a scatterplot?

• Find the highest and lowest points on the graph

• Identify two points on the line and use the slope formula

• Count how many points are above and below the line

• Multiply the x-values by the y-values

Tags

CCSS.8.EE.B.5

Which statement about interpolation is correct?

• It predicts values within the data range

• It guesses outside the data range

• It means all data points are connected

• It is less reliable than extrapolation

Tags

CCSS.HSF.LE.B.5

Which equation best models this trend: “For each extra mile driven past 10, gas usage increases by 0.5 gallons.”

Tags

CCSS.8.EE.B.5

A line of best fit predicts a value of 25. The actual value is 22. What is the residual?

• 3

• -3

• 25

• 22