Which set of ordered pairs represents a function? (2.-2). (1.5), (-2, 2), (1.-3). (8.-1)}
(3-1). (7.1). (-8.-1). (9. 1), (2, -1)}}
(6.3). (5.2).(-2.-5). (1.-3). (-2. 9)}
(-3. 1) (6.3) (-3.2) (-3. -3) (1.-1)}

Icould really use some with this question.

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.

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas