Which of the following represents a function? a. (5,1), (5,2), (5,3), (5,4)
b. (3,9), (-7,1) (6,12), (-3,-9)
c. (-5,6), (-5,6), (-5,6), (-5,6)
d. (8,3), (8,3), (-8,-3), (-8,-3)

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

Choose the linear inequality that describes the graph. the gray area represents the shaded region. a: y ≤ –4x – 2 b: y > –4x – 2 c: y ≥ –4x – 2 d: y < 4x – 2