Question

Which function has the given properties below?

The domain is the set of all real numbers.
One x-intercept is (2 pi, 0).
The amplitude is 4.
The point (StartFraction pi over 2 EndFraction, negative 4 EndFraction) is on the graph.
The y-intercept is (0, 0).
y = –4sin(x)
y = –4cos(x)
y = 4sin(x)
y = 4cos(x)

Answer 1

The given data are:

A function that:

The domain is the set of all real numbers

One x-intercept

The amplitude is 4

The y-intercept is (0,0)

From the choices, the functions containing "cosine" can be eliminated since the described function passes through (0,0). So, we are left with two choices:

`y = -4sin(x)` and
`y = 4sin (x)`

Given the amplitude of 4, the answer must be
`y = 4 sin(x)`