Respuesta :

The function:

[tex]y=\frac{3}{2}\cos (3x)+1[/tex]

has the form:

[tex]y=a\cdot\cos \lbrack b(x-c)\rbrack+d[/tex]

with a = 3/2, b = 3, c = 0. and d = 1.

The amplitude is represented by a, then the amplitude in this case is 3/2.