You have a $1,000 portfolio which is invested in stocks a and b plus a risk-free asset. $400 is invested in stock a. Stock a has a beta of 1. 3 and stock b has a beta of 0. 7. How much needs to be invested in stock b if you want a portfolio beta of 0. 9?.

An independent variable that the student controls during the experiment. (i'm not 100% sure this is correct, so i'm sorry if it's wrong)

The answer is : v = 55 + 8m plug in m = 25 v = 55 + 8(25) = 255 25 minutes after baxter begins filling the tank, the volume of water in the tank will be 255 gallons. slope: m = 8 gal/min for every min the water is on, the volume of water in the tank increases by 55 gallons. y-intercept: 55 (0,55) the initial volume of water in the tank was 55 gallons.