It takes 4 ounces of blue paint and 3 ounces of red paint to make Patrick's favorite shade of purple.
Multiply the numbers by 2. This will not affect the proportion. Thus, the new statement will be true respect to the original one.
It takes 8 ounces of blue paint and 6 ounces of red paint to make Patrick's favorite shade of purple. That's answer choice B.
Multiply the original numbers by 5. Again, this will not affect the proportion, meaning that the statement will remain true.
It takes 20 ounces of blue paint and 15 ounces of red paint to make Patrick's favorite shade of purple. This is answer choice D.
Thus, the answers are answer choices B and D.
