The percent of deaths caused by smoking is modeled by the rational function

where x is the number of times more likely a smoker is to die of lung cancer than a nonsmoker. This is the incidence rate. For example, x = 10 means that a smoker is 10 times more likely than a nonsmoker to die of lung cancer.

(a) Find P(x) if x = 10.

(b) For what values of x is P(x) = 80%?

(c) Can the incidence rate equal 0? Explain.

Transcribed Image Text:

P(x) x-1 X