It is estimated that failure to wear seat belts led to 9500 deaths last year. A study has shown that the number of deaths would decrease by 270 for every 1 percentage point gain in seat belt usage. Let y equal the predicted number of deaths in a year and x equal the percentage of people who wear seat belts. a. Report the slope b for the equation y = a + bx. b. If the y-intercept equals 28,880, then predict the number of deaths in a year if (i) no one wears seat belts, (ii) 74% of people wear seat belts, (ili) 100% of people wear seat belts. a. The slope is b =. b. (i) If no one wears seat belts, the predicted number of annual deaths is ]. (ii) If 74% of people wear seat belts, the predicted number of annual deaths is]. (ii) If 100% of people wear seat belts, the predicted number of annual deaths is ]