Answer
$(1,-1)$ and $(2,-5)$
Work Step by Step
We are given $m=-4$ and a point $(0,3)$.
Hence, use slope intercept form:
$y=mx +b$
Plug in the values:
$y=-4x+3$
Plug in some values for x to find another point:
$x=1 \rightarrow y=-1$
$x=2 \rightarrow y=-5$
$(1,-1)$ and $(2,-5)$