9514 1404 393
Answer:
b
Step-by-step explanation:
Use the distance formula with the two points Q and P, then simplify and match the pattern of the answer.
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\\\d=\sqrt{(b-0)^2+(-c-(-a))^2}\\\\\boxed{d=\sqrt{b^2+(-c+a)^2}}[/tex]
The value b goes in the green box.
