Letf

(

x

)

=

9.1

x

2

4.7

x

f(x)=9.1x2-4.7x

. Find the equation of the secant line on the graph off

(

x

)

f(x)

betweenx

1

=

3

x1=3

andx

2

=

9

x2=9

. Write your answer inm

x

+

b

mx+b

format.

y

=

y=