Common Core · Grade 8
8.SP.A.2
Grade 8 — Know that straight lines are used to model relationships between two quantitative variables, and informally fit a straight line to data.
The skill that covers it
What a student should be able to do
- Describe an association as positive, negative or absent from a scatter plot.
- Find the slope of a line of best fit through two points on it.
- Use a trend line to predict a value, and say when the prediction is trustworthy.
- Interpret the slope and the intercept of a trend line in context.