Question 118826
Find the missing value in (3, 2) and (6, y) if the ordered pairs are for the same direct variation.
Start with:
{{{y = kx}}} for the direct variation equation, then substitute x=3 and y=2 to find the value of k, the constant of proportionality:
{{{2 = k(3)}}} Divide both sides by 3.
{{{k = 2/3}}}
Now the equation is:
{{{y = (2/3)x}}} Substitute x = 6:
{{{y = (2/3)6}}}
{{{y = 4}}}
This is the missing value.