Sally is making a painting for which she is mixing red paint and blue paint. the table above shows the different mixtures being used.

question 1) what is the unit rate? (blue paint to red paint)

question 2) is it proportional? explain.

1 1/2 - 2 1/2 is 3/2:5/2     or a 3:5 ratio
2 2/5 - 4       is 12/5:20/5 or a 3:5 ratio
3 3/4 - 6 1/4 is 15/4:25/4 or a 3:5 ratio
4       - 6 2/3 is 12/3:20/3 or a 3:5 ratio
1.2- 2       if divided by .4 is a 3:5 ratio
1.8-3        if divided by .6 is a 3:5 ratio
the unit rate is 3:5
Since all units are 3:5 it is proportional