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MA.8.DP.1.3 · Linear Relationships, Data Analysis, and Functions

Fitting a Line to a Scatter Plot: Sample FAST Questions

A line of fit is an informal straight line drawn through a scatter plot with roughly as many points above it as below. 8th graders draw that line, then use it to describe the trend or estimate a value the data does not show directly.

How the FAST tests this benchmark

The FAST tests this with graphic response items where students place a line on a scatter plot and multiple choice items picking the best fit from several candidates. A line that touches the most points is not the same as a line that balances them, and that is the standard distractor.

Skills students need

  • Draw an informal line of fit through a scatter plot
  • Judge which line fits a data set best
  • Use a line of fit to estimate a value
  • Connect a line of fit to a linear function

Try 6 real MA.8.DP.1.3 questions

These come straight from Algebro's 8th grade pre-algebra question bank, easiest first. Answer one, check it, then move to the next.

Question 1 of 6

Answer it and Algebro checks it instantly

Question 1EasyMultiple Choice
The scatter plot compares days and plant height. A line of best fit through the points passes through (0,1)(0, 1) and (10,21)(10, 21). What is the slope of that line?

Showcase extra: the real practice and quiz players do not have this button.

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More 8th grade linear relationships and functions benchmarks

MA.8.F.1.1

Functions, Domain, and Range

MA.8.F.1.2

Deciding Whether a Function Is Linear

MA.8.F.1.3

Where a Function Increases, Decreases, or Stays Constant

MA.8.DP.1.3: Line of Fit Practice | Algebro