Question

Line m passes through C(-2, 0) and D(1, -3). What is the equation of the line m in standard form?

Answer 1

From general equation of a line;
y=mx+c
m=$\frac{change in y}{change in x}$
m=$\frac{0--3}{-2-1}$
m=-1
y=-x+c 
Finding value of c;
using point (-2,0)
0=-(-2)+c
c=-2
y=-x-2