Question

What is the value of y when x=9

Answer 1

2/3 = 9/y
cross multiply
2y = 9 * 3
2y = 27
y = 27/2
y = 13.5 or 13 1/2

Answer 2

Ok could be direcly proportional or inversely proprtional


directily proportional, is
x1/y1=x2/y2
where you are given x1,y1 and x2 or y2

inversely proprtional is
(x1)(y1)=(x2)(y2)
where yo are given x1,y2 and  x2 or y2



directly
y1=2
x1=3
y2=?
x2=9
3/2=9/?
3?=18
?=6
y=6

inverse
y1=2
x1=3
y2=?
x2=9
(3)(2)=(9)(?)
6=9?
2/3=?




if directly proportional, y=6
if inversely proportion, y=2/3