A verbal representation of a function is given. The antidepressant Prozac (fluoxetine hydrochloride) has a half-life of 9.3 days. Assume a one-time dosage of 20 mg. (a) Determine whether the function has a constant rate of change or a constant percentage change. O constant percent change O constant rate of change (b) Write an appropriate model for the function, where x is the number of days after dosage. (Round all numerical values to three decimal places.) f ( x ) = (c) If the model is linear, what are the slope and y-intercept? If the model is exponential, what are the y-intercept and growth (or decay) rate? (Round your answers to one decimal place.) slope, or growth (or decay) ---Select--- y-intercept mg