IXL | Interpret points on the graph of a linear function

This graph shows how the total number of undershirts Bill has in his wardrobe is related to the amount of money he spends on undershirts.

$200

$400

$600

$800

$1,000

100

Number of undershirts

Amount of money

Undershirts in Bill's wardrobe

In all, how much money does Bill need to spend in order to have a total of 70 undershirts in his wardrobe?

$500

$400

$300

$200

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Learn with an example

question

This graph shows how the cost of a corporate team-building event depends on the number of attendees.

100

$10

$20

$30

$40

$50

$60

$70

$80

$90

$100

Cost

Attendees

Cost of a corporate team-building event

How many attendees can there be, at most, if the budget for the corporate team-building event is $80?

attendees

solution

Find $80 on the y-axis. Move right until you intersect the graph.

100

$10

$20

$30

$40

$50

$60

$70

$80

$90

$100

Cost

Attendees

Cost of a corporate team-building event

Now move down until you intersect the x-axis.

100

$10

$20

$30

$40

$50

$60

$70

$80

$90

$100

Cost

Attendees

Cost of a corporate team-building event

You intersect the x-axis at 50 attendees. If the budget for the corporate team-building event is $80, there can be at most 50 attendees.

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Teacher tools

Work it out

Not feeling ready yet? These can help:

O.1Coordinate plane review

X.3Evaluate two-variable equations: word problems

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