Answer:
17 units
Step-by-step explanation:
Calculate the distance d using the distance formula
d = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = (1, 9) and (x₂, y₂ ) = (9, - 6)
d = [tex]\sqrt{(9-1)^2+(-6-9)^2}[/tex]
= [tex]\sqrt{8^2+(-15)^2}[/tex]
= [tex]\sqrt{64+225}[/tex]
= [tex]\sqrt{289}[/tex]
= 17
