Answer:
Going from 1 to 7. The not functions are 2,4,6, and 7
Step-by-step explanation:
How you can determine if its a function is if all x values are different. Vertical line test.
Answer:The second one (1,3), (1,7), (5,11), (5,15), (9,19) . the sixth one
( 1,3), (3,11), (3,7), (7,15), (9,19) and the last one (1,3), (3,7), (5,11), (9,15), (9,19) and the fourth one too
BBBBBBBBBBBBBBBBBBBBBBBBBBBB
3x+8=68 degrees
6x-8= 112 degrees
3x+8+6x-8=180
9x=180
x=20
3*20+8=68
6*20-8=112
