Hee Sun wants to estimate the average world length in a book. She randomly chooses 20 words in the book, as shown. Based on this
sample, which is the best estimate of the mean word length in the book? (I chose D, but I’m not sure if I’m correct.)
1 answer:
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We have
y²=-12x
the vertex is the point (0,0)------------- > see the attached figure
<span>
standard form: (y-k)^2=4p(x-h), with (h,k) being the (x,y) coordinates of the vertex.
vertex(0,0)
4p=-12---- > p=-12/4
p=-3
Focus:(-3,0)
</span>the answer is (-3,0)
y²=-12x
the vertex is the point (0,0)------------- > see the attached figure
<span>
standard form: (y-k)^2=4p(x-h), with (h,k) being the (x,y) coordinates of the vertex.
vertex(0,0)
4p=-12---- > p=-12/4
p=-3
Focus:(-3,0)
</span>the answer is (-3,0)