Question

Variable y varies directly with variable x, and y = 45 when x = 9.

What is value of y when x = 2?

Y = [ ]

Answer 1

since
\[y=kx\] and
\[45=k\times 9\] what is \(k\) ?

Answer 2

k is 5

Answer 3

ok then you are pretty much done
\(k=5\) and therefore
\[y=5x\] is the 'direct variation"
if you want to know what \(y\) is when \(x=2\) plug it in and see

Answer 4

so do 45=5x9?

Answer 5

?