Question

I have points (-2, -1) (1, 2) and I need to write an equation in point-slope form, one in standard form, and one in slope-intercept form...help please?

Answer 1

Y=mX+c
where m is the slope and c is the Y intersept.
m=(Y1-Y2)/(X1-X2)=(-2-1)/(-1-2)=1
therefore m=1
put this in to equation.
Y=X+c
using one of the point
put Y=2 and X=1
and get the c
2=1+c
c=1
now your done and you equation is
Y=X+1

Answer 2

which one is that?

Answer 3

Y=X+1