What is the minimum of the sinusoidal function?

Minimum is -4

when you graph a function on the coordinate place, the x-coordinates represents the input while the y-coordinates represent the output of the function, or the function value.

the lowest value of the a sinusoidal function is the minimum

the minimum is -4 because that is the lowest value of the sinusoidal function. it is the lowest y-value the function can attain.

Andrea's Expression: (1 - 0.2)^w

w: number of weeks

0.2: percent decrease

1 - 0.2: decay factor for each week

I got Eric's Expression wrong :(