Annual revenue R from McDonalds restaurants worldwide can be estimated by R = 19.1+1.8t, where R is in billion dollars and t is in years since January 1, 2005.13 (a) What is the slope of this function? Include units. Interpret the slope in terms of McDonalds revenue. (b) What is the vertical intercept of this function? Include units. Interpret the vertical intercept in terms of McDonalds revenue. (c) What annual revenue does the function predict for 2015? (d) When is annual revenue predicted to hit 35 billion dollars? 1

Chapter 16 — Chemical Thermodynamics 1 I. spontaneity A. spontaneous process — once started, proceeds on its own without a continuous external inﬂuence 1. irreversible under same conditions at which it is spontaneous 2. examples: a) gas particles mixing by diffusing b) heat ﬂowing from higher temperature...