Phone companies in the state of missouri have been debating on whether they should keep pay phones available to the public. the number of functioning pay phones in the state, in thousands, since 1997, is represented on the graph below.

It's not a line, so we rule out the first choice.

It might be the parabola. This particular one has a vertex at x=6506.78/(2(219)) = 14.9 which means it starts going up at that, not really matching that data at the end. But it still might be the best.

The decaying exponential is another good contender, perhaps the best. It seems to match general shape and there's no untoward increase after 15.

The increasing exponential can't be it.

I'm going to go with the decaying exponential, which matches the data and the story.

560

hope this : )

required rate of return = 0.166 = 16.6%

step-by-step explanation:

under the capital asset pricing model (capm), the required or expected rate of return for a particular security or asset is given using the formula:

required rate of return = risk-free rate + beta*(market risk premium)

we are given that;

risk-free rate = 4% = 0.04

beta = 1.4

market risk premium = 9% = 0.09

we simply plug these values into the above formula;

required rate of return = 0.04 + 1.4*(0.09)

required rate of return = 0.04 + 0.126

required rate of return = 0.166 = 16.6%