Question

I don’t know how to find y number 9:)

Answer 1

Awe, okay, I learned how to do this. Direct variation equation y=kx. So, I believe you're asking for help on 9 so here, y=k/X=k=y/x =-5/2. Now, plug back the fraction into y=kx like this, - 5/2(8) since X is 8 in this case, which equals - 20. What was just solved was your y for when X is 8.