The equation of the line passing through point $ \left(0,~-0.024\right) $, and point $ \left(32,~0.003\right) $ is:
$$ x-1185.1852y-28.4444=0 $$To find equation of the line passing through points $ A(x_A,y_A) $ and $ B(x_B,y_B) $, we use formula:
$$ y - y_A~=~\frac{y_B - y_A}{x_B - x_A}(x-x_A) $$In this example we have:
$$ \begin{aligned} & \left(0,~-0.024\right) \implies x_A = 0 ~~\text{and}~~ y_A = -0.024 \\[1 em] & \left(32,~0.003\right) \implies x_B = 32 ~~\text{and}~~ y_B = 0.003 \end{aligned} $$After substituting into the formula, we obtain:
$$ \begin{aligned} y - y_A~&=~\frac{y_B - y_A}{x_B - x_A}(x - x_A) \\[1 em] y - \left(-0.024\right)~&=~\frac{ 0.003 - \left(-0.024\right) }{ 32 - 0 } \left( x - 0 \right) \\[1 em]y + 0.024 ~&=~ 0.0008 \left( x - 0 \right) \\[1 em]y + 0.024 ~&=~ 0.0008x + 0 \\[1 em]y ~&=~ 0.0008x-0.024 \end{aligned} $$