Y=x-1 what's the slope please help me I have a test!! :/

What can be said about the relationship between triangles and circles? check all that apply. a) many circles can be inscribed in a given triangle b) exactly one triangle can be inscribed in a given circle c) exactly one circle can be inscribed in a given triangle d) many triangular shapes can be circumscribed about a given circle

Ineed with math stuff it involves graphs

What is the output, or dependent variable of quantity? 1: x 2: f(x) 3: y