Drew is scuba diving. The graph below models the amount of air remaining in his oxygen tank (y) over time (x)

answer:

125 yards

explanation:

75+50=125. that is my answer

h is the x-coordinate of the vertex

step-by-step explanation:

we have

in this function

the point represent the vertex of the function

so

h is the x-coordinate of the vertex

k is the y-coordinate of the vertex

i think the answer is a.( -3, -1 )