During 2019, Betty Russell purchased 250 shares of common stock issued by New Generation Electronics for $3200 including commission. Later in the same year, Betty sold the shares for $3300 after commission.
How do you find the profit on the stock transaction and the percentage return on investment?

wait this depends wether emily and zach how they are thinking.

yes they are the same.

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.

the ratio would be 4: 3, the four being for jackson, and the three being not for him.