Determine which relation is a function.
a.
{(–3, 3), (–2, 3), (–1, 1), (0, 4), (0, 1)}
b.
{(–3, 2), (–1, 3), (–1, 2), (0, 4), (1, 1)}
c.
{(–3, 2), (–2, 3), (–1, 1), (0, 4), (0, 1)}
d.
{(–3, 2), (–2, 3), (–1, 2), (0, 4), (1, 1)}

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25