Graph Proportional Relationship

The graph pictured shows the relationship between rainfall during the growing season and the growth if a type of plant. Which statements about the graph are true?

• The point (1,10) shows the constant of proportionality.

• The constant of proportionality is 5/7.

• The graph does not show a proportional relationship.

• The graph is a straight line through the origin.

• The point (28,20) means the type of plant grows 20 mm when it rains 28 cm.

Denmark uses the kroner as its currency. Before a trip to Denmark, Mia wants to exchange $1,700 for kroner. How many more kroner would Mia get if she exchanged her $1,700 at the bank with the better exchange rate?

True or False: Graphs that are proportional MUST be in a straight line.

• True

• False

Graphs that are proportional MUST go through the origin.

• True

• False

Select the correct answer.

• This graph is proportional.

• This graph is nonproportional because it's not a straight line.

• This graph is nonproportional because it doesn't go through the origin.

Select the correct answer.

• This graph is proportional.

• This graph is nonproportional because it's not a straight line.

• This graph is nonproportional because it doesn't go through the origin.

Select the correct answer.

• This graph is proportional.

• This graph is nonproportional because it's not a straight line.

• This graph is nonproportional because it doesn't go through the origin.

Select the correct answer.

• This graph is proportional.

• This graph is nonproportional because it's not a straight line.

• This graph is nonproportional because it doesn't go through the origin.

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional

What does the point (2, 94) represent in this situation?

• Every week, they earn $94.

• After 94 weeks, they save $2.

• After 1 week, they save $47.

• After 2 weeks, they save $94.