Answer quickly please!
 Please answer these questions to the best of your knowledge!
 1. Using the picture below, which set of ordered pairs models a function? (picture 1)
 2. Which comparison is true?
 a. 4 < square root of 18 < 4.5
 b. 4.5 < square root of 18 < 5
 c. 8.5 < square root of 18 < 9.5
 d. 17 < square root of 18 < 19
 3. Using the picture below, what is the solution to the system of linear equations? (picture 2)
 a. (-5, -4)
 b. (1, 3.5)
 c. y= -x + 11
 d. y= 3.5x + 1