Question 432626
You are told y varies inversely with x.
so {{{y = A/x}}} where A is some constant
You are told {{{200 =A/4}}} so {{{A= 800}}}
So now you can rewrite {{{y = A/x}}} as {{{y = 800/x}}}
Now you are told to find y when x = 10
{{{y = 800/10 = 80}}}