Step-by-step explanation:
y=2.5 and x=5
Then if x=10 then y=5
To solve this, you find out how much x changed, and then do the same thing to y.
So in this case, x=5 and then x=10. so that means we multiplied by 2.
So because y=2.5 and you multiple that by 2 you get y=5
Hope this helps!
