The table shows projections of sales (in billions of dollars) of hepatitis C treatments for a certain region from 2012 to 2016. Complete parts (a) through (c) Question Help Year 2012 2013 Sales (5 billions) 48 49 62 79 94 a. What is the quadratic function that best models these sales as a function of the number of years after 2010? Let x represent the number of years after 2010 and y represent the number of billions of dollars in sales of treatments 2016 (Type an equation. Use integers or decimals for any numbers in the equation Round to three decimal places as needed)