1.8.1 Expressing Relationships between Two Quantities

Algebra 11.8.1 Expressing Relationships between Two Quantities

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1.8.1 • Expressing Relationships between Two Quantities

Warm Up

In the image below, all the parallelograms have the same height. Base length is measured in inches, and area is measured in square inches.

A table can be used to show the relationship between the base length, $b$ , and the area, $A$ , of the parallelograms.

The image shows three parallelograms with dimensions as shown in the table.

$b$ (inches)	$A$ (square inches)
1	3
2	6
3	9
4.5	a. ____
$\frac{11}{2}$	b. ____
c. ____	36
d. ____	46.5

In the following activity, you will complete the table by entering the missing information.

Classroom Connection

Log into student.desmos.com using the information provided by your teacher to complete the activity.

What is your answer for $a$ ?

$a = 13.5$

What is your answer for $b$ ?

$b = \frac{33}{2}$

What is your answer for $c$ ?

$c = 12$

What is your answer for $d$ ?

$d = 15.5$

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- Authors: Lynn Marecek, MaryAnne Anthony-Smith, Andrea Honeycutt Mathis, Jay Abramson, Sharon North, Amy Baldwin, Alyssa Howell
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- Book title: Algebra 1
- Publication date: Jun 4, 2025
- Location: Houston, Texas
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- Section URL: https://openstax.org/books/algebra-1/pages/1-8-1-expressing-relationships-between-two-quantities

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