IXL | Find the constant of proportionality from a graph

Every Sunday, Herman and his friends get together to play their favorite board game, The Gems of

Rawumba.

Whoever collects the most gems wins! Players can earn gems by building mines.

There is a proportional relationship between the number of mines Herman builds,

and the number of gems he earns,

What is the constant of proportionality? Write your answer as a whole number or decimal.

gems per mine

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Learn with an example

Ava is starting a summer camp for children who are deaf or hard of hearing. She needs to hire enough counselors to chaperone the children.

There is a proportional relationship between the number of counselors Ava hires,

and the maximum number of children who can attend the camp,

What is the constant of proportionality? Write your answer as a whole number or decimal.

children per counselor

The graph of a proportional relationship is a straight line passing through the origin

(

)

If x and y have a proportional relationship, the constant of proportionality is the ratio of y to

To find the constant of proportionality, first identify the coordinates of one of the points on the line.

Calculate the ratio of the

y-coordinate

to the

x-coordinate.

The constant of proportionality is 3 children per counselor.

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