Which is NOT a function?
Will Give Brainlist
A.y-x=6
B.y=2x
C.x=-2
D.y+x=12

The answer is C

Step-by-step explanation:

When you graph it, it is a vertical line, which is undefined.

Given the position function

s(t) = 3 - cos(t )

differentiate once to get the velocity, and twice to get the acceleration:

v(t) = s'(t) = sin(t )   →   v (4.3 s) ≈ -0.92

a(t) = s''(t) = v'(t) = cos(t )   →   a (4.3 s) ≈ -0.40

The acceleration is negative, so the particle is slowing down.