The point-slope form is
[tex](y-y_1)=m(x-x_1)[/tex]Where m represents the slope of our function, and (x1, y1) the coordinates of our desired point.
Since our point is (0, -6), then
[tex]\begin{gathered} x_1=0 \\ y_1=-6 \end{gathered}[/tex]Our equation is originally written in slope-intercept form, and the coefficient of x represents the slope of our line, therefore, our slope is equal to 2. With this information, we can rewrite our equation in point-slope form.
[tex]\begin{gathered} (y-(-6))=2(x-0) \\ y+6=2(x-0) \end{gathered}[/tex]