Question

find an equation of variation where y varies directly as x and y= 0.8 when x=0.4

Answer 1

So you know that your equation should look something like \(y=kx\), so that as x gets bigger so does y and vice versa. Then just plug in .8 and .4: \(.8=.4k \implies k=2 \), so your equation is \(y=2x\).

Answer 2

thank you thank you thank you