Question

which one is the co-vertices and the vertices???

Answer 1

look at the yellow brick road
the answers always lie there

well I don't know about always really but what coordinates do you see the red curve intersecting with the yellow dashed rectangle

Answer 2

those will be your vertices

Answer 3

\[\frac{x^2}{a^2}-\frac{y^2}{b^2}=1 \]

here (a,0) and (-a,0) are the vertices)
where as (0,b) and (0,-b) are the co-vertices


\[\frac{y^2}{a^2}-\frac{x^2}{b^2}=1 \]

here (0,a) and (0,-a) are the vertices
where as (b,0) and (-b,0) are your co-vertices