Which relation is a function?
a.
{(8, –1), (2, –1), (3, 8), (2, 5}
b.
{(7, 12), (1, –5), (3, –10), (2, –5)}
c.
{(–3, 4), (–2, 5), (0, 9), (0, 12)}
d.
{(1, 2), (1, 5), (1, –1), (1, 4)}

Describe a pattern in each sequence what are the next two terms of each sequence -5, 5, -5, 5 a. subtract 10 from the previous term; -5,5 b. multiply the previous term by 1; 5, 5 c. add 10 to the previous term; -5, -15 d. multiply the previous term by -1; -5, 5