Consider the function ƒ(x) = (x + 1)2 – 1. Which of the following functions stretches ƒ(x) vertically by a factor of 4? Question 5 options:

A)

ƒ(x) = 4(x + 1)2 – 1

B)

ƒ(x) = 4(4x + 1)2 – 1

C)

ƒ(x) = (1∕4x + 1)2 + 3

D)

ƒ(x) = 1∕4(x + 1)2 – 4

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock