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School Event Bakery: Trend Decisions worksheet preview

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School Event Bakery: Trend Decisions

Analyze bakery trial data, draw an informal line of fit, and judge whether straight-line models are useful for scaling school-event recipes.

Grade 8MathInteractive · Printable

Aligned to8.SP.A.2

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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 a straight-line model by how closely the plotted observations follow it.
  • Students distinguish linear trends from curved patterns when evaluating bakery trial data.

How to use

Use after introducing scatter plots. Have students use a ruler for the drawing task, then compare model choices and discuss why a useful line need not touch every point.

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

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School Event Bakery: Trend Decisions

Fit straight lines to recipe-trial data and evaluate how well they model the points.

Flour Trials

A bakery is scaling recipes for a school event. Each point represents one trial. Use the scatter plot for Questions 1–4.

01234567891012345678910Recipe batchesFlour used (kg)
1.
What feature of the flour trials supports using a straight-line model?
  • A. The points curve upward more sharply as batches increase.
  • B. The points form a roughly straight, upward-sloping band.
  • C. The points stay near the same height as batches increase.
  • D. The points rise, so they must lie exactly on one line.
2.
Consider a proposed straight line through (0, 0) and (10, 10). Count only points strictly above this line; do not count points on it.

How many trial points are above the line?  

The preview shows the first questions. Unlock the worksheet to see all of it.

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