Which function will have a y-intercept at –1 and an amplitude of 2?
f (x) = negative sine (X) minus 1
f (x) = negative 2 sine (x) minus 1
f (x) = negative cosine (x)
f (x) = negative 2 cosine (x) minus 1

Options B and D.

Step-by-step explanation:

The general form of sine function

where, |A| is amplitude, is period, is phase shift and D is y-intercept.

The general form of cosine function

where, |A| is amplitude, is period, is phase shift and D is y-intercept.

In function,

Amplitude :

y-intercept : -1

In function,

Amplitude :

y-intercept : -1

In function,

Amplitude :

y-intercept : 0

In function,

Amplitude :

y-intercept : -1

Therefore, the correct options are B and D.

step-by-step explanation:

a and d

to complete this square you have to rotate about the origin 270 degrees clockwise.