What is the equation of this line? Please Help

y=1/2x -2
y=-2x -2
y=2x -2
y=-1/2x -2

Which table represents a linear function? i'll give brainliest to first answer ^'^

Arational number that is equivalent to -20/4?

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.