Timed. Don't take longer than an hour to answer. Written explanation not needed. Only correct work.

\f8. In 1980 the average gasoline efciency (in mpg) of all Toyota vehicles was 19.4. By 2005 the average mpg of all Toyota vehicles was 32.5. Assume that the this situation can be modeled by a line and that the trend continues. a) Find a linear equation that models this situation. Use t=0 as the year 1980. b) Use your equation to predict what would the average mpg of all Toyota vehicles be in the year 2030