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Tide-Pool Surveys: Counts and Slopes

Graph proportional tide-pool survey models, interpret slopes as counting rates, and compare relationships across graphs, tables, and equations.

Grade 8MathInteractive · Printable

Aligned to8.EE.B.5

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What’s included

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

Details

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

About this worksheet

What students practice

Students graph proportional relationships between survey size and expected animal counts.
Students interpret slope as the unit rate of a proportional survey model.
Students compare proportional relationships represented by graphs, tables, equations, and descriptions.

How to use

Use after introducing proportional graphs. Have students label graph axes and show rate calculations on separate paper, then discuss the final explanation.

Curriculum

Common Core standard covered

8.EE.B.5

Graph proportional relationships, read the unit rate as the slope, and compare two proportional relationships shown in different ways.

Preview

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Tide-Pool Surveys: Counts and Slopes

Graph survey models and compare the rates at which animal counts increase.

Read and Build Survey Graphs

Students on a marine biology field trip count individual animals of several tide-pool species. A quadrat is a sampling frame. All quadrats have the same area. The proportional models predict average counts; actual counts may vary.