Preheat your oven to 425°F (220°C).
Rub the chicken with olive oil, garlic powder, onion powder, salt, and pepper.
Place the chicken in a roasting pan and roast for 1 hour, or until the internal temperature reaches 165°F.
While the chicken rests, prepare the gravy: heat chicken broth in a saucepan and whisk in arrowroot powder until thickened.
Carve the chicken and serve with the gravy.