N 8
we have that
x ------> represents the total cases
y -----> daily cases
In this problem
the vertex is a maximum
so
the y-coordinate of the vertex represents the maximum number of cases in a day
the x-coordinate of the vertex represents the total cases that occur when the daily cases is a maximum
in this problem
the vertex is approximate the ordered pair ( 20,000, 1,200)
that means
there are total cases 20,000
and the daily cases are 1,200 (maximum of the graph)