Question 262526
y varies directly with x
can be translated as
{{{y = kx}}}
now we have a coordinate (x1,y1) and can substitute this in to ket k. We get
{{{y1 = x1*k}}}
Now, k  can be expressed as
{{{k = y1/x1}}}
this was given to us as 13.
We have a new equation whit our k value as
{{{y = 13x}}}
it turns out that the ratio of y2 to x2 will be
{{{y2 = 13x2}}}
which is
{{{y2/x2 = 13}}}
so any (x,y) coordinate will have a common ratio of 13.