Proportional Relationship Using Graphs Tables and Equations

Write the equation of the proportional relationship using the format y = kx.

Is the graph proportional?

• Yes

• No

Write an equation for the relationship between x and y. Use format y = kx.

Select all graphs that represent a proportional relationship.

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What is the constant of proportionality? Use the format k = 2.

Write the equation of the graph. Use the format y = kx.

What is the constant of proportionality?

• k = 3

• k = 1/3

• k = 3x

• k = 1/3x

Which statement about this graph is most true?

• It is proportional

• The cleaner uses 1 cup of vinegar to every 2 cups of cleaner

• The cleaner uses 4 cups of cleaner to 2 cups of vinegar

• All of the above

Is this a proportional equation?  Why?

• It is not proportional because it doesn't have a constant.

• It is not proportional because it doesn't have a constant rate of change.

• It is proportional because if x = 0, y = 0.

• It is proportional because it has a y intercept of 22.

Mr. Diaz changed his shower head to conserve water and energy. The table shows the relationship between the amount of flow and the duration of the water flow.

Which statement BEST describes the rate of water flow?

• 0.4 gallons per minute

• 2.1 gallons per minute

• 2.5 gallons per minute

• 3.0 gallons per minute