PLS HELP IT'S VERY IMPORTANT FOR ME 100POINTNO NOT SMART ANSWER AND SPAWN PLSSS Will mark as Brainliest

Solve for y to determine if the equations are direct, inverse, or neither.
2y=5x-6
x/9-4/y
x=5
xy=30
4y=x
x+2y=14
y=-2
y=3x-1
y=x
10=y/x
x=y/-7
y=-2/5x
2x+y=0
y=-2
2y=-3x
x+y=9
y=-2/5x
y=6/x
y=-48/x
xy=-18

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).