Please help! Select the lines that represent functions.

Use the graph to determine the range. which notations accurately represent the range? check all that apply. (–∞, 2) u (2, ∞) (–∞, –2) u (–2, ∞) {y|y ∈ r, y ≠ –2} {y|y ∈ r, y ≠ 2} y < 2 or y > 2 y < –2 or y > –2

Which of the following can be used to explain a statement in a geometric proof?

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction