Plz !
which of the following sets of ordered pairs satisfies the requirements for being a linear function?

(−1, 3), (0, 5), (1, 7), (2, 9), (3, 11)
(−1, 1), (0, 3), (1, 4), (2, 6), (3, 5)
(5, 0), (10, 2), (15, 4), (20, 4), (22, 6)
(4, 1), (5, 2), (6, 4), (8, 5), (9, 7)

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

The tile along the edge of a triangular community pool needs to be replaced? ?