Find the x-intercepts of the parabola with vertex (-1,-16) and y intercept (0,15), write your answer in this form (x1,,y2)

hello :
the parabola's equation is : f(x) = a(x+1)²+16
the coefficient of the squared expression in the parabola's equation is : a
but ; f(0) = 15 ...  ( y-intercepts (0,15) )

15 = a(0+1)²+16
15 =a +16

a=-1
f(x) = -(x-1)²+16

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.