How to evaluate the function f(x)=9x+2 given independent value a. f(-8) b. f(x+6) c. f(-x) ?

1 Answer
Jun 9, 2018

Please see below.

Explanation:

.

f(x)=9x+2

color(red)(a))

To find f(-8), we plug in -8 wherever we see x in f(x):

f(-8)=9(-8)+2=-72+2=-70

Similarly:

color(red)(b))

f(x+6)=9((x+6)+2=9x+54+2=9x+56

color(red)(c))

f(-x)=9(-x)+2=-9x+2