Answer:
(2, 1)
Step-by-step explanation:
Using the midpoint formula
midpoint = [ [tex]\frac{1}{2}[/tex](x₁ + x₂ ), [tex]\frac{1}{2}[/tex](y₁ + y₂ ) ]
with (x₁, y₁ ) = (1, - 1) and (x₂, y₂ ) = (3, 3)
= [ [tex]\frac{1}{2}[/tex](1 + 3), [tex]\frac{1}{2}[/tex](- 1 + 3) ]
= (2, 1)