Question

What is the equation of the line that passes through the points (1,-1) and (3,3)

Answer 1

y=2x-3

Explanation:

y=mx+b

-1=1m+b

3=3m+b

subtract those two ^

-4=-2m

2=m

-1=1m+b

-1=1(2)=b

-1=2+b

-3=b

y=2x-3