OwlSheets
Tide-Pool Species: Search Models worksheet preview

WorksheetPremium

Tide-Pool Species: Search Models

Interpret slopes and intercepts, predict tide-pool species counts, and compare linear models for two survey habitats.

Grade 8MathInteractive · Printable

Aligned to8.SP.A.3

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
  • 14 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

About this worksheet

What students practice

  • Students use linear model equations to predict species counts and determine survey area or time.
  • Students interpret slopes and intercepts using the quantities and units in a species survey.
  • Students compare linear model predictions and explain why predicted counts may be fractional.

How to use

Use after introducing linear models for paired data. Have students show substitutions on separate paper, then discuss how model predictions differ from actual counts.

Curriculum

Common Core standard covered

8.SP.A.3

Use the equation of a linear model to solve problems with paired data, explaining what the slope and intercept mean.

Preview

OwlSheets.com

Name Date

Tide-Pool Species: Search Models

Use linear models to plan surveys and interpret species-count predictions.

Survey Area and Species

A marine biology class counts distinct species, not individual organisms. Use the stated model rather than treating each recorded count as an exact model value.

Earlier field trips recorded the total area searched and the number of distinct tide-pool species found. A biologist uses S = 0.75a + 5, where a is the area searched in square meters and S is the predicted number of distinct species. Use this model for areas from 4 to 24 square meters.
1.
Earlier Tide-Pool Surveys
Area searched (m²)Species found
49
810
1618
2422
The class plans to search 12 m². Use S = 0.75a + 5 to predict the number of distinct species.

Predicted count:   species

2.
Select the two statements that correctly interpret the slope of S = 0.75a + 5.

Each additional square meter searched is associated with 0.75 more predicted species.Each additional species requires exactly 0.75 square meter of search area.An additional 4 square meters searched corresponds to 3 more predicted species.Every square meter searched contains exactly 0.75 species.

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

Related worksheets