Write an equation for a line that passes through the points (1,1) and (-1,3)

Question

Write the answer in standard form

Answer 1

y = mx + b

m = (y₂ - y₁ ) / (x₂ -x₁ )

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

y-y₀ = mx + b

y-1 = -x + 1

y = -x + 2

test:

y = -(-1) + 2

y = 1 + 2

y = 3