13 Level 3: Ki-Moon noticed that a bamboo plant in his backyard was growing at a constant rate. He measured the plant in inches 4 and 9 days
after planting it and recorded his findings in the table below.
Day
0
1
2
3
4
5
6
7
8
9
Height
14
29
b) How tall was the bamboo plant when it was initially planted? Show your work.
Show Your Work

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

i think the answer is b.

step-by-step explanation:

not 100% sure though.

d. all of the above

step-by-step explanation: