Suppose there is a simple index of three stocks, stock ABC, stock XYZ, and
stock QRS. Stock ABC opens on day 1 with 4000 shares at $3.15 per share.
Stock XYZ opens on day 1 with 5000 shares at $4.30 per share. Stock QRS
opens on day 1 with 6000 shares at $4.60 per share. The price of stock ABC
on day 8 begins at $3.50. The price of stock XYZ on day 8 begins at $3.90.
Stock QRS opens on day 8 with a price of $4.50 per share. Assume that each
stock has the same number of shares that it opened with on day 1. What is
the rate of change of this simple index over 1 week?
O A. 1.9%
O B. 2.0%
O C. -1.9%
O D. -2.0%

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.

5/20 so 25%

step-by-step explanation:

(hint): the answer is in the question.