Use the graph to the right to answer the following questions. The \( x \) -values represent the number of years past \( 2000 \) .
a. Use the graph to approximate the online enrollment in fall \( 2009 \) .
b. The function \( f ( x ) = 0.52 x + 0.78 \) approximates the online enrollment (in millions). Use the function to approximate the online enrollment in fall \( 2009 \) .
a. Using the graph, the online enrollment in fall \( 2009 \) is between \( \square \) and \( \square \) million. Type two consecutive whole numbers.
(Round to the nearest whole number as needed.)
b. Using the function, the online enrollment in fall \( 2009 \) is approximately \( \square \) million.
(Type an integer or a decimal.)