We know that
A relationship between two variables, x, and y,<span> is proportional if it can be expressed in the form y/x=k or y=kx</span>
in this problem
k=2
then
y=2x
therefore
the answer is the option
y=2x
The answer is B.
Hope that helped! :)
[tex]\begin{gathered} C=\text{ 72000 + 18x} \\ R=\text{ 27x } \\ \\ R\text{ }
Therefore, the company loses money if it sells less than 8000.
The answer is D.
Y - 9 = -8(x + 4)
y - 9 = -8x - 32
y = -8x - 23
