The vocal cords in your throat .

collapse
vibrate
compress

vibrate

Explanation:

Vocal folds vibrate when excited by aerodynamic phenomena; they are not plucked like a guitar string. Air pressure from the lungs controls the open phase. The passing air column creates a trailing “Bernoulli effect,” which controls the close phase.

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answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6