Answer:
y = 21
Step-by-step explanation:
since y = 7 as x = 4, therefore, when x = 12, y = 21
Think about it. if you divide 7 by 4, you get 1.75 and if you divide 21 by 12, you get 1.75. That means that from 4 to 12, I multiplied by 3, so therefore, y = 21.
