Question

A certain cosine function has an amplitude of 5 which functional rule could model this situation

Answer 1

f(x)= 5cos(x) +3

1) Considering a generic cosine function as y= Acos(Bx +C) +D the amplitude, or half the length between the highest point of the curve is found by:

`Amplitude\colon\textA`

2) Examining the given options, then we can state that f(x)= 5cos(x) +3 has an amplitude of 5 units