Mathematics Grade 8 15 min

Interpret tables

Interpret tables

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1

Introduction & Learning Objectives

Learning Objectives Identify and describe the key components of a table, including rows, columns, and headers. Extract specific data points from a table accurately based on given criteria. Compare and contrast different data values within a table to answer specific questions. Identify and describe trends or patterns present in tabular data. Perform basic calculations (e.g., sum, difference, average) using data extracted from tables. Draw logical conclusions and make informed decisions based on the information presented in tables. Relate tabular data to real-world scenarios and explain its significance. Ever wonder how your favorite sports team tracks player stats 📊 or how a scientist organizes experiment results? Tables are everywhere, helping us make sense of information...
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Key Concepts & Vocabulary

TermDefinitionExample TableA structured arrangement of data in rows and columns, designed to organize and display information clearly.A table showing the daily high temperatures for a week, with days as rows and temperature as a column. RowA horizontal series of cells in a table. Each row typically represents a single record or entry.In a table of student grades, each row might represent a different student's data (e.g., Alice's scores). ColumnA vertical series of cells in a table. Each column typically represents a specific attribute or category of data.In a table of student grades, one column might be 'Math Score' and another 'Science Score'. Header Row/ColumnThe first row or column (or both) of a table that contains labels describing the data in the respec...
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Core Formulas

Rule for Locating Specific Data `\text{Data Value} = \text{Cell at (Row Header, Column Header)}` To find a specific piece of information, first identify the relevant row header, then the relevant column header, and locate the data in the cell where they intersect. Rule for Comparing Data `\text{Comparison} = \text{Value}_A \text{ vs. } \text{Value}_B` (e.g., `\text{Value}_A > \text{Value}_B`, `\text{Value}_A < \text{Value}_B`, or `\text{Value}_A = \text{Value}_B`) To compare two data points, extract both values from the table and use appropriate mathematical comparison operators to determine their relationship. Rule for Calculating Aggregates (Sum/Average) `\text{Sum} = \sum_{i=1}^{n} \text{Value}_i` ; `\text{Average} = \frac{\sum_{i=1}^{n} \text{Value}_i}{n}`...

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Sample Practice Questions

Challenging
Use the table below. Assume T-shirts were sold for $6 each and candy bars for $2 each. | Grade | T-Shirts Sold | Candy Bars Sold | Total Revenue ($) | | :---- | :------------ | :-------------- | :---------------- | | 6th | 50 | 150 | 600 | | 7th | 65 | 120 | 610 | | 8th | 80 | 100 | N/A | | 9th | 70 | 130 | 680 | The 'Total Revenue' for the 8th grade is missing ('N/A'). Based on the prices given, what value should be in that cell?
A.$680
B.$600
C.$720
D.$480
Challenging
Use the table below to answer the question. | Model | Screen Size (inches) | Camera (MP) | Battery Life (hours) | Price ($) | | :---- | :------------------- | :---------- | :------------------- | :-------- | | A | 6.1 | 12 | 20 | 799 | | B | 6.7 | 48 | 25 | 999 | | C | 6.5 | 12 | 22 | 849 | A tech reviewer claims, 'You always have to pay more for a better camera.' Based ONLY on the data in this table, which statement best evaluates this claim?
A.The claim is fully supported, as the most expensive model has the best camera.
B.The claim is not fully supported, as one model is more expensive than another but has the same camera quality.
C.The claim is false, as the cheapest model has the best camera.
D.The claim cannot be evaluated with this data.
Challenging
Use the table below to answer the question. | Student | Test 1 (out of 100) | Test 2 (out of 100) | Test 3 (out of 100) | | :------ | :------------------ | :------------------ | :------------------ | | Alice | 85 | 92 | 88 | | Bob | 78 | 80 | 85 | | Carol | 90 | 85 | 91 | | David | 70 | 75 | 72 | | Emily | 95 | 90 | 93 | To correctly identify the data point '90', one must find the intersection of which row header and column header?
A.Row: Emily, Column: Test 2
B.Row: Carol, Column: Test 2
C.Row: Carol, Column: Test 1
D.Row: Emily, Column: Test 3

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