# Math Help - Direct variation

1. ## Direct variation

y varies directly as (x+5) and f(2)=3. Set up the Equation

2. y varies directly as (x+5)
translates to the equation $y = k(x+5)$ , where $k$ is the constant of proportionality

use $f(2) = 3$ to find $k$ ...

$3 = k(2+5)$

$k = \frac{3}{7}$

so, the function is $y = \frac{3}{7}(x+5)$