Let [tex]f(x)=9-2^x[/tex]
Graph y=f(x) for [tex]1\leq x\leq 3[/tex]
Come up with a method to approximate [tex]A(f,1\leq x\leq 3)[/tex]
Using this method, calculate the area that approximates [tex]A(f,1\leq x\leq 3)[/tex]
Note that this will be an approximate answer using the graph.