What are the coordinates of the vertex of the graph? Is it a maximum or a minimum?

Question

a. (−2, −1); maximum
b. (−1, −2); maximum
c. (−2, −1); minimum
d. (−1, −2); minimum

the graph shows the shape like a U and it's towards the negative area

Answer 1

so its a minimum

but you need the equation to find the vertex

Answer 2

c. (−2, −1); minimum
or
d. (−1, −2); minimum