IXL | Graph a relationship between two variables

Rachel bought 5 small fossils in the gift shop at the natural history museum she visited yesterday. They inspired her to start a fossil collection. Now, she looks for them everywhere she goes! Let

be the number of new fossils Rachel gets, and let

be the total number of fossils in her collection.

The equation

represents this relationship. Graph the relationship.

x-axis, New fossils collected, y-axis, Total fossils in collection. Coordinate plane graph with 1 quadrants, x-axis coordinates from 0 to 10, y-axis coordinates from 0 to 10.

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Learn with an example

question

Mackenzie needs to memorize vocabulary words for her French class. Her mother helps by quizzing Mackenzie for 10 minutes each night. Let

be the number of nights her mother quizzes her, and let

be the total number of minutes Mackenzie is quizzed.

The equation

represents this relationship. Graph the relationship.

solution

To graph the relationship

first find two points that satisfy the equation. Then, draw the line through those points.

Plug in

to find one point.

(

)

When

then

Write this as an ordered pair,

(

)

Plug in

to find a second point.

(

)

When

then

Write this as an ordered pair,

(

)

Now, draw the line through

(

)

and

(

)

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Work it out

Not feeling ready yet? This can help:

CC.12Complete a table and graph a two-variable equation

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