Question

Question:

The variables x and y are directly proportional, and y = 4 whenx = 3. What is the value of y whenx = 15?

Answer 1

the answer is y=20 because if they’re proportional then they increase at the same rate. to get from c=3 to x=15 u multiply by 5 and dice x and y are proportional you would multiply the y value, y=4 by 5 to get y=20