Determine whether y varies with x, if so, find the constant variation of k and write the equation.

Question

nnesha · Answer

what is the equation for direct variation ?

anonymous · Answer

X      Y
4       6.4
7        11.2
10       16
13       20.8

anonymous · Answer

@Nnesha

anonymous · Answer

it increases by 1.8 each time..

nnesha · Answer

y =kx equation for direct variation 
you can solve for  k so divide both sides by x $$\huge\rm \frac{ y }{ x }=k$$
now divide y  by x if you get same number then yes

anonymous · Answer

Thank you

nnesha · Answer

$\color{blue}{\text{Originally Posted by}}$ @Justmeneedinghelp
it increases by 1.8 each time..
$\color{blue}{\text{End of Quote}}$
by 1.8 or 1.something else ? :D

nnesha · Answer

so  k=what ?

anonymous · Answer

1.6

nnesha · Answer

yes right :=) good job!