Homework Help: college algebra

Posted by Melissa on Tuesday, February 28, 2012 at 2:50pm.

A magazine company had a profit of $98,000 per year when it had 32,000 subscribers. When it obtained 35,000 subscribers, it had a profit of $117,500. Assume that the profit P is a linear function of the number of subscribers s.

a.) Find the function P

b.) What will the profit be if the company has a total of 50,000 subscribers?

c.) What is the number of subscribers needed to break even?

college algebra - David, Wednesday, February 29, 2012 at 12:23am
you have two points (32000,98000) and (35000,117500)

Find the slope (117500-98000)/(35000-32000)

put into point slope form

y-y0=m(x-x0)

using one of the two points for x0 and y0.

b) Plug in x as 50,000 and solve for y.

c) plug in y as 0 and solve for x

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