Which sets of ordered pairs are functions? Choose all that apply . | a) (9, - 1), (8, - 2), (7, - 3), (6, - 4) b) (5,-1),(5;-2,),(5,12),(5,0) ) (4, 2), (- 4, 2), (2, 4), (- 2, - 4) d) (1,-4),(2,-4,),(3,-4),(4,-4) e) (5, 8), (4, 9)(5, 9) * (4, 8)​

i think the answer is 90 hope this

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions

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