Which set of ordered pairs is not a function?

(4, -2), (-2, 2), (2, -2), (4, 2)

(-4, 2), (-2, 2), (2, 2), (4, 2)

(-4, 2), (-2, -2), (2, 2), (4, 2)

(-4, -2), (-2, -2), (2, 2), (4, 2)

addition

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.