Which ordered pair needs to be removed in order for the mapping to represent a function? (–3, –4) (–2, –1) (1, –3) (3, 7)

none needs to be removed.   the x-values (inputs) of this relation are all different, and with each x-value there is exactly one y-value, so the given mapping represents a function.

the answer is (-2, -1) in order for it to be function.

b.-4 units

all you   do is count how many times you move