Which relation is not a function? Group of answer choices (7, 3), (7, 6), (7, 9), (7, 12) (7, 15) (-4, 6), (0, 6), (7, 6), (4, 6), (-7, 6) (4, 1), (8, 2), (12, 3), (16, 4), (20, 4) (1, 3), (3, 5), (5, 7), (7, 9), (9,1)

sorry i dont know my friend

your answer is a

step-by-step explanation:

4*4*4*4=256

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3