Suppose there is a simple index of three stocks, stock ABC, stock XYZ, and stock QRS. Stock ABC opens on day 1 with 8000 shares at $4.25 per share.
Stock XYZ opens on day 1 with 5000 shares at $2.90 per share. Stock QRS
opens on day 1 with 2000 shares at $6.40 per share. The price of stock ABC
on day 8 begins at $3.90. The price of stock XYZ on day 8 begins at $2.50.
Stock QRS opens on day 8 with a price of $6.10 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?
A. 9.7%
B. -8.8%
O C. -9.7%
D. 8.8%

answer: 140

step-by-step explanation:

so just add all then it will be your answer but i am not pretty sur eif it is but hope this i am here to people

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

x=0

step-by-step explanation: