Question

What is the equation of the graph below? On a coordinate plane, a curve goes through (0, 0). It has a maximum of 1 and a minimum of negative 1. It goes through one cycle at StartFraction 2 pi Over 3 EndFraction y = sine (StartFraction x Over 3 EndFraction) y = sin(3x) y = sin(0.3x) y = sine (StartFraction 2 x Over 3 EndFraction)

Answer 1

Answer B

Explanation:

y = sin(3x)

Answer 2

y=cos(x+π)

Explanation:

Known that the cosine function has a period of 2π.

Now, the parental function is y = cosx, which has y-intercept at y = 1, and x-intercept at π/2.

Notice that the function showed in the graph attached has y-intercept at y = -1 and x-intercept at π/2. This indicates that the function has been moved leftwards π units.

Therefore, the function that belongs to this graph is

`y=cos(x + \pi)`