WorksheetPremium

Farmers’ Co-op: Rainfall and Yield

Evaluate informal straight-line models for rainfall and crop yield using scatter plots, vertical gaps, and new field observations.

Grade 8MathInteractive · Printable

Aligned to8.SP.A.2

Buy this worksheet: $1.50

Or unlock every Premium worksheet with Premium

PrintUnlock to print

Answer keyUnlock to see answers

Assign to classUnlock to assign with a class code

What’s included

Single worksheet
Auto-graded online
1 Common Core standard
Printable answer key
13 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 8
Subject: Math
Question types: Fill in the blank, Multiple choice, Circle the answer, Short answer, Drawing

About this worksheet

What students practice

Students draw an informal straight line that follows the center of a scatter plot’s linear trend.
Students judge straight-line fit using the sizes and patterns of gaps between observations and a line.
Students identify when a straight line fits only part of a rainfall-and-yield data set.

How to use

Have students draw with a ruler, then compare their informal lines. Use the supplied models for numerical fit checks so answers do not depend on students’ drawings.

Curriculum

Common Core standard covered

8.SP.A.2

Know straight lines model linear trends in scatter plots, fit a line informally, and judge the fit by how close the points are.

Preview

OwlSheets.com

Name Date

Farmers’ Co-op: Rainfall and Yield

Fit straight lines and check how well they represent crop observations.

A First Field Trial

The co-op compares rainfall during one growing period with corn yield. Each point represents one field. Yield is measured in metric tons per hectare (t/ha).

Which description would best support the co-op’s decision to try a straight-line model for these fields?

A. The points form a level band, so the model should show no change in yield.
B. The points show exact increases, so the model should pass through every observation.
C. The points rise and then fall, so the model should pass through a central peak.
D. The points form a roughly straight rising band, with some variation in yield.