IXL | Write a two-variable equation

Read the following description of a relationship:

The maple tree in Franklin's backyard is 3 years younger than the willow tree.

Let

represent the willow tree's age and

represent the maple tree's age.

Complete the equation that represents the relationship between

and

w	m
6	3
7	4
8	5
9	6

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Learn with an example

question

Read the following description of a relationship:

On each necklace Tiana makes, there are 4 more purple beads than silver beads.

Let

represent the number of silver beads and

represent the number of purple beads.

Complete the equation that represents the relationship between

and

s	p
2	6
3	7
4	8
5	9

solution

Read the description of the relationship between the number of silver beads,

and the number of purple beads,

On each necklace Tiana makes, there are 4 more purple beads than silver beads.

In this relationship,

is the input, and

is the output. So, you can find

by adding 4 to

Express this relationship as an equation.

You can use the table to check your answer.

s	p
2	6
3	7
4	8
5	9

In each row of the table, plug the value from the

column into the equation. See if you get the value in the

column.

s	s + 4	p
2	2 + 4 = 6	6
3	3 + 4 = 7	7
4	4 + 4 = 8	8
5	5 + 4 = 9	9

The values in the

column are the same as the values in the

column.

The equation for this relationship is:

Looking for more? Try this:

$Confetti$

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Teacher tools

Work it out

Not feeling ready yet? These can help:

MM.9Graph a two-variable relationship

MM.6Complete a table for a two-variable relationship

O.12Multiplication input/output tables: find the rule

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