Select the relation that IS a function. a) {(-6, -5), (3, 2), (10, 8), (3, 3)}

b) {(-2, -1), (5, -1,) (16, 3) (-3, -9)}

c) {(5, 10), (-3, 10), (-3, -10), (4, 7)}

d) {(21, 11), (21, 10), (21, 9), (21, 8)}

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

need more info

step-by-step explanation:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

(-5,-28)

i graphed to on desmos.