Help me i need this for khan academy

  y = (9/2)x

Step-by-step explanation:

Since the relation is proportional, the equation is ...

  y = kx

For any (x, y) pair, you can find k as ...

  y/x = k

Using the first pair, we get ...

  k = 9/2

so the equation is ...

  y = (9/2)x

__

In decimal, that's ...

  y = 4.5x

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.