Proportional Relationship and Ratio Tables

complete the ratio table.

What is the value of x?

The x2 and x5 shown on the outside of the table are demonstrating:

• constant of proportionality

• scale factor

• length of the table

The x3 on the outside of the table is:

• the constant of proportionality

• the scale factor

• not relevant to the relationship

What is the constant of proportionality?

According to this proportional relationship, how many hours would it take someone to read 8 books?

Does this table represent a proportional relationship?

• Yes - there is a constant of proportionality

• No - there is not a constant of proportionality

Does the table represent a proportional relationship?

• Yes.

• No.

Does the table represent a proportional relationship?

• Yes.

• No.

Which situation BEST represents a proportional relationship?

• Sam sold 2 bracelets for $3 and 3 bracelets for $5.

• Jimmy ran 3 miles in 30 minutes and 5 miles in 45 minutes. 

• Larry packed 27 glasses in 9 cases and 45 glasses in 15 cases. 

•  Finn placed 8 markers in 2 boxes and 16 markers in 8 boxes.