Determine the amplitude (a), period (p), and phase shift (ps) of the function f(x) = 7cos (9x).

D) A=7,  , PS=(0,0) is correct.

Step-by-step explanation:

Given function is

Compare that with formula

we get:

A=7, B=9, C=0, D=0

In that formula, amplitude is given by formula |a|

Hence amplitude = |a|=|7|= 7

In that formula, period is given by formula

Hence period =

Phase shift is given by formula  

Hence phase shift =

So the last choice D) A=7,  , PS=(0,0) is correct.

the axial of symmetry

step-by-step explanation:

y/x=18

step-by-step explanation: