BEFORE RP.1.2

The points on the coordinate plane show the amount of red and yellow paint in each batch.
Which equation represents the relationship between red paint, 𝑟, and yellow paint, 𝑦, in each batch

• y = (3/2)r
• r = (3/2)y
• y = (2/3)r
• r = (2/3)y

The ordered pair (1, 5) indicates the unit rate of books to cost on the graph shown. 
What does the point on the graph represent? 

• 5 books cost $1
• 1 book costs $5
• 0 books cost $5
• 5 books cost $0

Is the graph proportional or not proportional?

• Proportional: it is a straight line.
• Not proportional: it does not go through the origin
• Proportional: it goes through the origin.
• Not proportional: it is not a straight line.

Which best describes the graph represented in this table?

• Proportional: all the ratios are constant and equal 9/7.
• Not proportional: the ratios are not constant.
• Proportional: all the ratios are constant and equal 7/9
• Not proportional: the ratios all equal different fractions.

What is the constant of proportionality (k) for this graph?

• 1/6
• 9
• 1/2
• 6

Is this table proportional?  Justify your answer.

• Yes; the ratio of total cost to number of movies is constant.
• Yes; the ratio of number of movies to total cost is constant.
• No; the ratio of total cost to number of movies is not constant.
• Yes; the ratio of number of movies to total cost is not constant.