Please answer, will give brainliest.

What is the slope of a line that is perpendicular to y = 3x + 1

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

What is the equation of a line that passes through points (0, 4) and (-4,-8)?