Question

11.

Which is an equation of the line that passes
through the points (1,3) and (-1,1)?
A.
x= 1
B.
y = 2x + 1
C.
y=x+2
D.
y=3

Answer 1

y=x+2

Explanation:

m=(1-3)/(-1-1)=-2/-2=1

y-y1=m(x-x1)

y-3=1(x-1)

y-3=x-1

y=x-1+3

y=x+2